Cita APA (7a ed.)

National Geographic Society., Grosvenor, G. M., Peele, W. T., & Cook, D. W. (1973). Central America: Mexico. National Geographic Society.

Cita Chicago Style (17a ed.)

National Geographic Society., Gilbert M. Grosvenor, William T. Peele, y David W. Cook. Central America: Mexico. Washington (D.C.): National Geographic Society, 1973.

Cita MLA (9a ed.)

National Geographic Society., et al. Central America: Mexico. National Geographic Society, 1973.