APA (7th ed.) Citation

Northen, H. (1968). Introductory plant science (3d ed.). Ronald Press Co..

Chicago Style (17th ed.) Citation

Northen, Henry. Introductory Plant Science. 3d ed. New York: Ronald Press Co., 1968.

MLA (9th ed.) Citation

Northen, Henry. Introductory Plant Science. 3d ed. Ronald Press Co., 1968.