APA (7th ed.) Citation

Ballard, R. D., & Eugene, T. (2004). Mystery of the ancient seafarers. National Geographic.

Chicago Style (17th ed.) Citation

Ballard, Robert D., and Toni Eugene. Mystery of the Ancient Seafarers. Washington, DC: National Geographic, 2004.

MLA (9th ed.) Citation

Ballard, Robert D., and Toni Eugene. Mystery of the Ancient Seafarers. National Geographic, 2004.