APA Style

Perricone, N. (2003). The acne prescription : the Perricone program for clear and healthy skin at every age / Nicholas Perricone. . NEWYORK: HarperResource.

MLA Style

Perricone, N.. "The acne prescription : the Perricone program for clear and healthy skin at every age / Nicholas Perricone.". NEWYORK: HarperResource, 2003. Text.