Also visit the official APA style website. In July, 2009, the sixth edition of the APA Style Manual was released. See What's new in the 6th edition of the publication manual? and this tutorial about the changes. You may wish to start with this tutorial on the basics of APA style. With the release of the 6th edition, the APA have also started an APA style blog.
- Are they kept to a minimum? (Avoid overusing abbreviations. In general, a reader will find your work easier to read if you don't use abbreviations. Abbreviate judiciously.)
- Are all non-conventional abbreviations fully expanded when first used? (e.g., Australian Bureau of Statistics (ABS))
- Are conventional abbreviations used? For example, ANOVA.
- Symbols (such as =) used as replacements for words (e.g., equals) should be treated as words in terms of punctuation. Therefore, = should always have a space before and after. Example (p = .31 is correct; p=.31 is not correct). Other examples of symbols include > and <.
- Where referring to specifically measured constructs within the study, use first-letter capitalisation (e.g., Self Confidence); where referring the theoretical construct, do not use capitalisation (e.g., self confidence).
For further reading on this topic, see the 6th edition Publication Manual section “Citing References in Text” (pp. 174–179).
- Only cite resources which you have directly consulted, otherwise secondary citations should be used.
- Citations involve author and year, with the full details provided in the reference list.
- Citations in brackets should be in alphabetical order, e.g., (Ashton, Numena, & Kelly, 2000; Donohue & Wong, 1997; Klein, 1990)
- When citing a source with six or more authors, use first author et al. (e.g., Smith et al., 2009)
- For a more detailed set of examples, see , , , 
- If a reference is cited more than once in a paragraph, the subsequent citations should not include the year. e.g., "...race, religion, sexuality, gender and age (Baumeister & Bushman, 2008). This concept refers to an us versus them, or alternatively the in-group versus the out-group mentality (Baumeister & Bushman)..."
- et al. should be used for the initial and subsequent citations within a paper when there are six or more authors.
- Is "et al." used for second and subsequent citations which have three or more authors?
- Use Times New Roman 12 point font throughout.
- The first line of each paragraph should be indented.
- Do not use underline.
- Use italics for emphasis.
- Italicise statistical symbols which use the normal alphabet.
- Comma usage (a common issue is incorrectly leaving out commas before "and" when listing three of more items) - See more details about comma punctuation rules:  - 
- Be clear and consistent about the use of "grammatical person". Third person is most common, followed by first person.
Numbers and statistics
- "The general rule governing APA style on the use of numbers is to use figures to express numbers 10 and above and words to express numbers below 10" (APA, 2001, p. 122).
- Test statistics and p values should generally be rounded to two decimal places.
- All statistical symbols that are not Greek letters should be italicised (M, SD, t, p, etc.).
- Where a number could be above or below one (in theory), also include the preceding 0 (e.g., skewness = 0.71).
- Be wary of making causal claims based on cross-sectional data.
Parts of a manuscript
For research-based articles and reports, the following are the typically recommended parts:
- Maximum length tends to vary between ~150 and ~250 words depending on publisher requirements. Thesis abstracts are often longer e.g., up to ~500 words.
- Not indented
- Starts at the top of the page
- Optional; usually only for complex designs
- Optional; usually only for complex or unusual analyses
- Data is plural; datum is singular.
- Issue numbers should not be cited for journal with consecutively numbered issues (i.e., most of them).
(do not include the material in brackets - its just for explanation):
- APA style: Electronic sources (Wikipedia)
- APA List of references (see last section for electronic referencing; dianahacker.com)
- How to reference electronic resources (apastyle.org)
- APA style with electronic references (Northern Michigan University)
Book article or chapter
Quality of expression
- Avoid one sentence paragraphs.
From sections 3.34 - 3.41:
- Direct quotes less than 40 words should be enclosed in double-quotation marks.
- Page number(s) should be included for direct quotations.
- Quotes > 40 words should be put on a new line and inset left and right, without quotation marks.
- Do not put "..." at the start or end of quotes, but "..." can be used in the middle of quotes to indicate that some content is missing.
Tables and Figures
- Centre on page horizontally.
- Avoid breaking tables and figures across pages.
- Centre horizontally on the page
- Right align statistics presented in tables.
- Left align text presented in tables.
- Caption goes above, like this:
- Table 1
- Average Ages Sexual Information was Acquired Compared with the Youngest and Oldest Ages Subjects Believed the Information Should be Acquired
- Example Table (Plonsky, Appendix 4)
- Centre horizontally on the page
- Caption goes below, like this:
- Figure 2. Number of people arrested for drunken driving as related to the day of the week.
- Example Figure caption (Plonsky, Appendix 5)
- Section 3.32 of APA style manual is "Selecting the Levels of Heading" (pp. 114-115)
- 5 essential tips for APA style headings
- Burton, L. J. (2009). An interactive approach to writing essays and research reports in psychology (3rd ed.). Milton, Qld, Australia: John Wiley & Sons. BF76.7.B87 2010
- Smyth, T. R. (2004). The principles of writing in psychology. New York: Palgrave Macmillan. BF76.7.S678 2004
- APA style (Wikipedia)
- A Guide for Writing Research Papers based on Styles Recommended by the APA
- APA Cheat Sheet
- APA style (University of Canberra; to be transferred here)
- APA Style Asylum
- APA Style Essentials (Degelman & Lorenzo, 2007), Vanguard University of Southern California
- Preparing your lab report (Note the checklist for Tables and Figures at the end)
- Psychology with style: A hypertext writing guide (Plonsky)
- Research and documentation online
- Writing an APA Lab Report (University of Washington; pdf)