Cita APA (7a ed.)
Grosvenor, G. M., & Breeden, R. L. 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.
Cita MLA (9a ed.)
Grosvenor, Gilbert M., y Robert L. Breeden. Exploring America's Backcountry. National Geographic Society, Special Publications Division.
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