APA (7th ed.) Citation

Kern, D. (2004). Clear skin: Heal your skin and end the breakouts once and for all. A Perigee Book.

Chicago Style (17th ed.) Citation

Kern, Dan. Clear Skin: Heal Your Skin and End the Breakouts Once and for All. New York: A Perigee Book, 2004.

MLA (9th ed.) Citation

Kern, Dan. Clear Skin: Heal Your Skin and End the Breakouts Once and for All. A Perigee Book, 2004.