APA (7e ed.) Bronvermelding

(1988). Inventors and discoverers: Changing our: World. National Geographic Society.

Chicago (17e ed.) Bronvermelding

Inventors and Discoverers: Changing Our: World. Washington D.C.: National Geographic Society, 1988.

MLA (9e ed.) Bronvermelding

Inventors and Discoverers: Changing Our: World. National Geographic Society, 1988.

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