Place the cited author's surname and the source's page number in parentheses after a sentence or phrase from a print source that has a listed author. An example is: (Smith, 57). If your parenthetical notation appears at the end of a sentence, put the period after the final parenthesis mark.
Place the first word or phrase of a source's listing as it appears on your Works Cited page in parentheses if the source does not have a listed author. Follow it with a comma and the source's page number. If you cite information from the third page of a pamphlet about water testing that has no listed author, for example, then use this parenthetical notation: (Water Testing, 3).
List the author's last name in a set of parentheses without a page number for a website. Because websites do not have traditional page numbers, they don't require a page number in the parenthetical notation. A parenthetical notation example is: (Smith).