APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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