To cite a textbook in APA style can be a lot more complicated than any other citation. These citations also tend to be the longest because of the number of authors most textbooks have. You have to cite the page, paragraph and chapter in addition to the regular information that you need in a citation. There are tons of citation generators out there that come in handy when you are writing a college
Read more.... paper. I used http://citationmachine.net/ all through school because it had APA and MLA style citations.