Cita APA

Cottrell, L. 1. (1962). The Anvil of civilization (6th printing.). New York: The New American Library.

Citación estilo Chicago

Cottrell, Leonard 1913-1974. The Anvil of Civilization. 6th printing. New York: The New American Library, 1962.

Cita MLA

Cottrell, Leonard 1913-1974. The Anvil of Civilization. 6th printing. New York: The New American Library, 1962.