APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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