Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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