APA (7 वां संस्करण) प्रशस्ति पत्र

National Geographic Society (U.S.) Special Publications Division. (1979). Mysteries of the ancient world. The Society.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

National Geographic Society (U.S.) Special Publications Division. Mysteries of the Ancient World. Washington: The Society, 1979.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

National Geographic Society (U.S.) Special Publications Division. Mysteries of the Ancient World. The Society, 1979.