APA Citatie

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

Chicago Style citaat

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

MLA citatie

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

Let op: Deze citaties zijn niet altijd 100% accuraat.