National Geographic Society. Special Publications Division. (1986). Builders of the ancient world: Marvels of engineering. The Society.
Chicagoスタイル(17版)引用形式National Geographic Society. Special Publications Division. Builders of the Ancient World: Marvels of Engineering. Washington, D.C: The Society, 1986.
MLA(9版)引用形式National Geographic Society. Special Publications Division. Builders of the Ancient World: Marvels of Engineering. The Society, 1986.
警告: この引用は必ずしも正確ではありません.