APA (7th ed.) Citation

Sessions George & Devall Bill. (1985). Deep Ecology. Peregrine Smith Books.

Chicago Style (17th ed.) Citation

Sessions George and Devall Bill. Deep Ecology. Peregrine Smith Books, 1985.

MLA (8th ed.) Citation

Sessions George and Devall Bill. Deep Ecology. Peregrine Smith Books, 1985.

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