Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.