National Geographic Society. Special Publications Division. (1986). Builders of the ancient world: Marvels of engineering. The Society.
Цитирование в стиле Чикаго (17-е изд.)National Geographic Society. Special Publications Division. Builders of the Ancient World: Marvels of Engineering. Washington, D.C: The Society, 1986.
Цитирование MLA (9-е изд.)National Geographic Society. Special Publications Division. Builders of the Ancient World: Marvels of Engineering. The Society, 1986.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.