Cita APA

Abbey, E., Cole, D., Founds, G., & Georgia, L. (1973). Wilderness U.S.A. Washington: National Geographic Society.

Citación estilo Chicago

Abbey, Edward,, Dill Cole, George Founds, y Lowell Georgia. Wilderness U.S.A. Washington: National Geographic Society, 1973.

Cita MLA

Abbey, Edward,, Dill Cole, George Founds, y Lowell Georgia. Wilderness U.S.A. Washington: National Geographic Society, 1973.