Dyfyniad APA

Schwartz, E., & Colman, C. (1998). Natural energy: From tired to terrific in 10 days. Putnam.

Dyfyniad Arddull Chicago

Schwartz, Erika, and Carol Colman. Natural Energy: From Tired to Terrific in 10 Days. New York: Putnam, 1998.

Dyfyniad MLA

Schwartz, Erika, and Carol Colman. Natural Energy: From Tired to Terrific in 10 Days. Putnam, 1998.

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