APA (7th ed.) Citation

Earle, S. A. (2014). Blue hope: Exploring and caring for earth's magnificent ocean. National Geographic.

Chicago Style (17th ed.) Citation

Earle, Sylvia A. Blue Hope: Exploring and Caring for Earth's Magnificent Ocean. Washington, D.C: National Geographic, 2014.

MLA (9th ed.) Citation

Earle, Sylvia A. Blue Hope: Exploring and Caring for Earth's Magnificent Ocean. National Geographic, 2014.