APA (7th ed.) Citation

Pirages, D., & Ehrlich, P. R. (1974). Ark II; social response to environmental imperatives. Viking Press.

Chicago Style (17th ed.) Citation

Pirages, Dennis, and Paul R. Ehrlich. Ark II; Social Response to Environmental Imperatives. New York: Viking Press, 1974.

MLA (9th ed.) Citation

Pirages, Dennis, and Paul R. Ehrlich. Ark II; Social Response to Environmental Imperatives. Viking Press, 1974.