APA (7th ed.) Citation

Knowlton, N. (2010). Citizens of the sea: Wonderous creatures from the census of marine life. National Geographic Society.

Chicago Style (17th ed.) Citation

Knowlton, Nancy. Citizens of the Sea: Wonderous Creatures from the Census of Marine Life. Washington, D.C.: National Geographic Society, 2010.

MLA (8th ed.) Citation

Knowlton, Nancy. Citizens of the Sea: Wonderous Creatures from the Census of Marine Life. National Geographic Society, 2010.

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