APA (7th ed.) Citation

Urwellen, R. H. (2009). Oil spill costs and impacts. Nova Science Publishers.

Chicago Style (17th ed.) Citation

Urwellen, Robert H. Oil Spill Costs and Impacts. New York: Nova Science Publishers, 2009.

MLA (9th ed.) Citation

Urwellen, Robert H. Oil Spill Costs and Impacts. Nova Science Publishers, 2009.