APA (7th ed.) Citation

Helvarg, D. (2001). Blue frontier: Saving America's living seas. W.H. Freeman.

Chicago Style (17th ed.) Citation

Helvarg, David. Blue Frontier: Saving America's Living Seas. New York: W.H. Freeman, 2001.

MLA (8th ed.) Citation

Helvarg, David. Blue Frontier: Saving America's Living Seas. W.H. Freeman, 2001.