Cita APA (7a ed.)
Blair, J. P., & Grosvenor, G. M. The Alps. National Geographic Society, Special Publications Division.
Cita estilo Chicago (17a ed.)
Blair, James P., y Gilbert M. Grosvenor. The Alps. Washington, EUA: National Geographic Society, Special Publications Division.
Cita MLA (9a ed.)
Blair, James P., y Gilbert M. Grosvenor. The Alps. National Geographic Society, Special Publications Division.
Precaución: Estas citas no son 100% exactas.