Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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