Below are some examples of Reference List citations formatted in APA style. Note the difference for each type source. Also note these are full citations that go at the end of your paper, not in-text citations, which should be included throughout your paper as you utilized your sources in your writing.
Smith, J.A. (2010). Dental materials in the twenty-first century. New York: Elsevier.
Smith, E.B. (2009). Chairside manner and dental health education: techniques and strategies. Journal of Dental Practice, 32, 204-215. doi:10.1037/0477-6670.41.22.319
White, C.S. (2005, June). Xylitol gum: new applications for an old material. Dental Assisting Weekly, 15(6), 35-39.
Crest whitening strips. (2010). Crest.com. Retrieved from http://www.crest.com/creststrips/