Cita APA

Ketchum, R. M. 1. (1957). The American heritage book of great historical places. New York, New York: American Heritage.

Citación estilo Chicago

Ketchum, Richard M. 1922-. The American Heritage Book of Great Historical Places. New York, New York: American Heritage, 1957.

Cita MLA

Ketchum, Richard M. 1922-. The American Heritage Book of Great Historical Places. New York, New York: American Heritage, 1957.