Where to start is the big question when it comes to APA. The following headings offer various places depending on what you need.
If you have never used the American Psychological Association (APA) Style Sheet, try this 20-minute power point presentation from the American Psychological Association: http://www.apastyle.org/learn/tutorials/basics-tutorial.aspx
It covers formatting and citation. If you are a visual learner, this power point demonstration will be great to look at before you turn to a manual.
If all you need is to know how to cite an electronic journal article or a web page on the reference page, then try this page from the Purdue Online Writing Lab: http://owl.english.purdue.edu/owl/resource/560/10/
If your electronic source has an author, then just give the name and date in parentheses just like you would any other source.
Example: (Gilmore, 2005).
If your electronic source does not have an author (a web site, for instance, might not have an author listed), then begin with the title of an article in quotation marks. For a book or a journal, italicize the title.
Example: (“Trade Agreements”, 2007).
If you are using a web site that is large, offer the reader some help in finding the passage you are citing by numbering the paragraphs and referring to the section. Use the abbreviation "para." to refer to the word paragraph.
Example: (Gilmore, 2005, Conclusion section, para. 17).
If no date is given, then use "(n.d.)," which means "no date."
More examples can be found at the Purdue Online Writing Lab site http://owl.english.purdue.edu/owl/resource/560/03/
You do not put the URL in the in-text citation.
Sometimes just seeing a model helps you with formatting. Here is a link to a sample paper: http://owl.english.purdue.edu/media/pdf/20090212013008_560.pdf
The APA Manual is written for researchers, not students, so if your needs are basic, then consider one of the following resources (all are available at the CSU bookstore):
APA requires attention to detail in ways that other style manuals do not (even though they require details too). When you refer to a handbook, take care to notice the following details: