How do I make an in-text citation for an information acquired from a website (If the writer and publication date is known)? Is it necessary to write out the full URL? I found APAstyle.org's explanation ambiguous.
APA in-text citation style uses the author's last name and the year of publication, for example: (Field, 2005). For direct quotations, include the page number as well, for example: (Field, 2005, p. 14). For sources such as websites and e-books that have no page numbers, use a paragraph number.
So in your case you could cite (Author name, Year, Paragraph Number).
Here is some more information when you do not have page numbers from Prudue University OWL
Sources Without Page Numbers
When an electronic source lacks page numbers, you should try to include information that will help readers find the passage being cited. When an electronic document has numbered paragraphs, use the abbreviation "para." followed by the paragraph number (Hall, 2001, para. 5). If the paragraphs are not numbered and the document includes headings, provide the appropriate heading and specify the paragraph under that heading. Note that in some electronic sources, like Web pages, people can use the Find function in their browser to locate any passages you cite.