Books (6.28)
The date follows the author's name and is enclosed in parentheses and a period after the last parenthesis. For books, give the year. You find most publication information inside the book on the reverse of the title page. Look for the © symbol to find the year. Give the most recent year listed.
Example:
Coleman, S. C. (2005).
Journals, Newspapers, & Magazines
Journals often contain a month and year of publication. Give only the year in the following format (Year).
Example:
Wade, K. L. & Tillman, B. (2009).
Most newspapers and magazines list a day as well as a month and year. Give all the information listed in the following format (Year, Month Day). Always spell out the month name.
Example:
Schulyer, T. (1993, September 2).
If a season or more than one month is given, treat these as you would a single month.
Example:
Riley, H. J. (2011, Fall).
Harris, C., Hall, A., & Cicero, H. D. (2004, July-August).
No date
Items without any date listed are most commonly websites, but use n.d. (for no date) for any item that does not have a publication date listed.
Example:
Johnson, K. L. (n.d.).