APA (7th ed.) Citation
Dugan, R., & Cuwen, R. C. (1967). World beneath the sea. National Geographic Society.
Chicago Style (17th ed.) Citation
Dugan, Robert, and Robert C. Cuwen. World Beneath the Sea. National Geographic Society, 1967.
MLA (9th ed.) Citation
Dugan, Robert, and Robert C. Cuwen. World Beneath the Sea. National Geographic Society, 1967.
Warning: These citations may not always be 100% accurate.