APA (7th ed.) Citation

Ehrenfeld, D. W. (1972). Conserving life on earth (Rev. ed.). Oxford University Press.

Chicago Style (17th ed.) Citation

Ehrenfeld, David W. Conserving Life on Earth. Rev. ed. New York: Oxford University Press, 1972.

MLA (9th ed.) Citation

Ehrenfeld, David W. Conserving Life on Earth. Rev. ed. Oxford University Press, 1972.