APA (7th ed.) Citation

Stuart, G. S. (1979). Secrets From the Past. National Geographic Society.

Chicago Style (17th ed.) Citation

Stuart, Gene S. Secrets From the Past. [Estados Unidos]: National Geographic Society, 1979.

MLA (9th ed.) Citation

Stuart, Gene S. Secrets From the Past. National Geographic Society, 1979.

Warning: These citations may not always be 100% accurate.