Cita APA (7th ed.)

Gerrard, M. (2007). National Geographic traveler (2nd ed.). National Geographic Society.

Cita Chicago (17th ed.)

Gerrard, Mike. National Geographic Traveler. 2nd ed. Washington, D.C: National Geographic Society, 2007.

Cita MLA (9th ed.)

Gerrard, Mike. National Geographic Traveler. 2nd ed. National Geographic Society, 2007.