In-Text Citations:
When using APA format, follow the author-date method of in-text citation. This means that the author's last name and the year of publication for the source should appear in the text, for example, (Jones, 1998), and a complete reference should appear in the reference list at the end of the paper.
If you are referring to an idea from another work but NOT directly quoting the material, or making reference to an entire book, article or other work, you only have to make reference to the author and year of publication and not the page number in your in-text reference. All sources that are cited in the text must appear in the reference list at the end of the paper.
References:
The list of your full citation entries is called References in APA style. Your reference list should appear at the end of your paper. It provides the information necessary for a reader to locate and retrieve any source you cite in the body of the paper. Each source you cite in the paper must appear in your reference list; likewise, each entry in the reference list must be cited in your text.
Basic Format for Encycopedia Entries:
Auther, A. A. (Year of Publication). Title of entry. In Title of encyclopedia in which entry is contained. (volume xx, pages xx). City of Publication: Publisher.
Example:
Bergmann, P. G. (1993). Relativity. In The New Encyclopedia Britannica. (Vol. 26, pp. 501-508). Chicago, IL: Encyclopedia Britannica.
Basic Format for Articles from a Journal:
Author, A. A., Author, B. B., & Author, C. C. (Year). Title of article. Title of Periodical, volume number(issue number), pages. http://dx.doi.org/xx.xxx/yyyyy (if applicable)
Example:
Harlow, H. F. (1983). Fundamentals for preparing psychology journal articles. Journal of Comparative and Physiological Psychology, 55, 893-896.