In-text citation for research paper. How to look for a "source" when a reference is an article on a website?
when you are citing a particular document or piece of information from a website, include both a reference list entry and an in-text citation. 

The key to creating the reference list entry is to determine the type of content on the web page. Basically, provide the following four pieces of information:
Author, A. (date). Title of document [Format description]. Retrieved from http://xxxxxxxxx

The in-text citation includes the author and date (Author, date), as with any other APA Style citation.

You can read more about this from the APA style guide website at: http://www.apastyle.org/learn/quick-guide-on-references.aspx 

Check out the "More Information" section for further clarification on what to do if there is no author, year or page numbers. 

I hope this is what you were asking.  Andy ;-)