APA (7th ed.) Citation

Hyman, B. M., & Pedrick, C. (2009). Obsessive-compulsive disorder. Twenty-First Century Books.

Chicago Style (17th ed.) Citation

Hyman, Bruce M., and Cherry Pedrick. Obsessive-compulsive Disorder. Minneapolis: Twenty-First Century Books, 2009.

MLA (9th ed.) Citation

Hyman, Bruce M., and Cherry Pedrick. Obsessive-compulsive Disorder. Twenty-First Century Books, 2009.