References 
AcneHubs. (2011). Types Of Acne. Retrieved August 30, 2011, from AnceHubs database.
Upton, L. K. (1999, December/). Beautiful Skin. Total Health, 20(5), 22. Retrieved from Ebsco database.
WebMd. (2011, February 3). Acne Treatment Overview. Retrieved September 9, 2011, from WebMd database.