Cita APA (7a ed.)
Grosvenor, G. M., & Breeden, R. L. (1979). Exploring America's Backcountry. National Geographic Society, Special Publications Division.
Cita estilo Chicago (17a ed.)
Grosvenor, Gilbert M., y Robert L. Breeden. Exploring America's Backcountry. Washington, EUA: National Geographic Society, Special Publications Division, 1979.
Cita MLA (9a ed.)
Grosvenor, Gilbert M., y Robert L. Breeden. Exploring America's Backcountry. National Geographic Society, Special Publications Division, 1979.
Precaución: Estas citas no son 100% exactas.