APA aipamena

National Geographic Socity. Special Publication Division & Gray, W. B. (1978). Power of nature. Prepared by the Special Publication Division, National Geographic Society.

Chicago Style aipamena

National Geographic Socity. Special Publication Division and William B. Gray. Power of Nature. Washington, DC: Prepared by the Special Publication Division, National Geographic Society, 1978.

MLA aipamena

National Geographic Socity. Special Publication Division and William B. Gray. Power of Nature. Prepared by the Special Publication Division, National Geographic Society, 1978.