Cita APA (7th ed.)

Perry, S., & Dawson, J. (1988). The secrets our body clocks reveal. Rawson Associates.

Cita Chicago (17th ed.)

Perry, Susan, i Jim Dawson. The Secrets Our Body Clocks Reveal. New York: Rawson Associates, 1988.

Cita MLA (9th ed.)

Perry, Susan, i Jim Dawson. The Secrets Our Body Clocks Reveal. Rawson Associates, 1988.