Cita APA

Fearnsides, W. G., & Bulman, O. M. B. Geology in the service of man. New York: Penguin.

Citación estilo Chicago

Fearnsides, W. G., y O. M. B. Bulman. Geology in the Service of Man. New York: Penguin.

Cita MLA

Fearnsides, W. G., y O. M. B. Bulman. Geology in the Service of Man. New York: Penguin.