APA aipamena

National Geographic Society (Washington, D.C.), & Friedberg, L. (1992). Mysteries underground. The Society.

Chicago Style aipamena

National Geographic Society (Washington, D.C.), and Lionel Friedberg. Mysteries Underground. Washington, D.C: The Society, 1992.

MLA aipamena

National Geographic Society (Washington, D.C.), and Lionel Friedberg. Mysteries Underground. The Society, 1992.