APA (7th ed.) Citation

Maas, J. B., & Wherry, M. L. (1998). Power sleep: The revolutionary program that prepares your mind for peak performance. Villard.

Chicago Style (17th ed.) Citation

Maas, James B., and Megan L. Wherry. Power Sleep: The Revolutionary Program That Prepares Your Mind for Peak Performance. New York: Villard, 1998.

MLA (9th ed.) Citation

Maas, James B., and Megan L. Wherry. Power Sleep: The Revolutionary Program That Prepares Your Mind for Peak Performance. Villard, 1998.