Hi there,

This is a tricky one, as the article in question was excerpted from a published book. Normally when citing online articles, you would cite the website as the publisher, but in this case the article should be treated as a print resource, and cited as you would an excerpt from a book:

Campbell, D. E. (2010). Choosing democracy: A practice guide to multicultural education (4th ed.). Boston, MA: Allyn & Bacon.

I wasn't able to italicize it here, but note that the book title should always be italicized (or underlined if you are handwriting the citation).

If you need more help, I suggest checking out Purdue's online Writing Lab; it contains an excellent guide to APA citation standards (I've linked to it below).