APA (7th ed.) Citation

Cahn, R. (1978). Footprints on the planet: A search for an environmental ethic. Universe Books.

Chicago Style (17th ed.) Citation

Cahn, Robert. Footprints on the Planet: A Search for an Environmental Ethic. New York: Universe Books, 1978.

MLA (9th ed.) Citation

Cahn, Robert. Footprints on the Planet: A Search for an Environmental Ethic. Universe Books, 1978.

Warning: These citations may not always be 100% accurate.