Dyfyniad APA

Stefferud, A., & Briggs, S. (1956). The wonders of seeds. Harcourt, Brace and Company.

Dyfyniad Arddull Chicago

Stefferud, Alfred, and Shirley Briggs. The Wonders of Seeds. New York: Harcourt, Brace and Company, 1956.

Dyfyniad MLA

Stefferud, Alfred, and Shirley Briggs. The Wonders of Seeds. Harcourt, Brace and Company, 1956.

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