APA način citiranja

(2005). National geographic: Why we love caffeine. Washington, DC: National Geographic Society.

Čikaški stil citiranja

National Geographic: Why We Love Caffeine. Washington, DC: National Geographic Society, 2005.

MLA način citiranja

National Geographic: Why We Love Caffeine. Washington, DC: National Geographic Society, 2005.

Upozorenje: Ovi citati možda nisu uvijek 100% točni.