APA stands for the American Psychological Association. APA refers to a sstyle of documentation of references.
The main purpose is to direct your reader to the original source of the information you are citing.
1. A work that includes an author and page number
The last name of the source’s author, followed immediately by the year it was published in parentheses. You can also put both the author’s last name and year of publication in parentheses. ex: Lindsey (2010) or (Lindsey, 2010).
You must include a page number for direct quotations. ex: (Lindsey, 2010, p. 200)
2. More than one week written by an author in a single year
Assign lowercase letter after the date to distinguish between the two works ex: Lindsey (2010a) (Lindsey, 2010b)
3. More than one work in a single note
Separate the citations with a semicolon and list them alphabetically.
4. A whole Web site
Give the electronic address in the paper, but does not need to be included in the References list, this is only if you are not citing a particular Web document.
5. Two or more sources in a single sentence
Insert the notes directly after the statements they support.
6. A single source provides a series of references
Reference the first reference, then the page number after others.
7. Quotations of forty words or more
Indent a long quotation five spaces from the left margin, omit quotation marks, and place the parenthetical note outside the final punctuation mark.
The References Page
List aphabetically every source you used directly, except for personal communications, title “References.”
1. Center the title “References” at the top of the page, no quotes
2. Arrange the items alphabetically by last name of the author. Give initials for the first names.
3. List two or more entries by the same author by year of publication, earliest to latest.
4. Make first line of each entry flush with the left-hand margin. Subsequent lines are indented by five spaces.
5. Double-space the list.
6. Punctuate items carefully. Remember that a period ends each entry –except those that terminate with an electronic address.
7. Capitalize only the first word and any proper names in the title of a book or article. Within a title, capitalize the first word after a colon.
8. When an electronic source includes a DOI(Digital Object Identifier), use the DOI in place of a URL.