APA (7e ed.) Bronvermelding

National Geographic Society. Special Publications Division. (1986). Builders of the ancient world: Marvels of engineering. The Society.

Chicago (17e ed.) Bronvermelding

National Geographic Society. Special Publications Division. Builders of the Ancient World: Marvels of Engineering. Washington, D.C: The Society, 1986.

MLA (9e ed.) Bronvermelding

National Geographic Society. Special Publications Division. Builders of the Ancient World: Marvels of Engineering. The Society, 1986.