APA (7th ed.) Citation

Sierra Club, Porter, E., & Brower, K. (1970). Galapagos: The flow of wildness. Sierra Club ; Ballantine Books.

Chicago Style (17th ed.) Citation

Sierra Club, Eliot Porter, and Kenneth Brower. Galapagos: The Flow of Wildness. San Francisco : New York: Sierra Club ; Ballantine Books, 1970.

MLA (9th ed.) Citation

Sierra Club, et al. Galapagos: The Flow of Wildness. Sierra Club ; Ballantine Books, 1970.