APA (7th ed.) Citation

Billings, W. D. (1970). Plants, man, and the ecosystem (2d ed.). Wadsworth Pub.

Chicago Style (17th ed.) Citation

Billings, William Dwight. Plants, Man, and the Ecosystem. 2d ed. Belmont, Calif: Wadsworth Pub, 1970.

MLA (9th ed.) Citation

Billings, William Dwight. Plants, Man, and the Ecosystem. 2d ed. Wadsworth Pub, 1970.