APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.