Cita APA (7th ed.)

Sears, B. (1997). Mastering the zone: The next step in achieving superhealth and permanent fat loss. Regan Books.

Cita Chicago (17th ed.)

Sears, Barry. Mastering the Zone: The Next Step in Achieving Superhealth and Permanent Fat Loss. New York: Regan Books, 1997.

Cita MLA (9th ed.)

Sears, Barry. Mastering the Zone: The Next Step in Achieving Superhealth and Permanent Fat Loss. Regan Books, 1997.