In-text citation in APA Style uses an author-date system. Place the author's name and year of publication in parentheses, separated by a comma (#1). If the name of the author appears in the text, cite only the year in parentheses (#2). If both author and year appear in the text, don't include a parenthetical citation (#3).
#1: In the beginning stages... (Jenkins, 2003)
#2: Jenkins (2003) described the beginning stages...
#3: In his seminal 2003 study, Jenkins described ...
Sources with multiple authors:
2 authors: cite both names every time; e.g., (Smith & Jones, 2014)
3+ authors: cite only the 1st author plus et. al. subsequently; e.g., (Smith et al., 2013)
In general, for a direct quote (rather than a paraphrase), provide a page number in the citation in addition to the author and date.
But in the words of the inimitable Winnie: “Rivers know this: there is no hurry. We shall get there some day” (Milne, 1926, p. 79).
**For more examples, please see the APA Manual or the OWL APA Guide.