APA

Stefferud A., . (1956). The wonders of seeds: Illustrated by Shirley Briggs. New York: Harcourt, Brace.

Chicago

Stefferud Alfred, . 1956. The wonders of seeds: Illustrated by Shirley Briggs. New York: Harcourt, Brace.

Harvard

Stefferud A., . (1956). The wonders of seeds: Illustrated by Shirley Briggs. New York: Harcourt, Brace.

MLA

Stefferud Alfred, . The wonders of seeds: Illustrated by Shirley Briggs. New York: Harcourt, Brace. 1956.