Tohutoro APA (7th ed.)
Urwellen, R. H. (2009). Oil spill costs and impacts. Nova Science Publishers, Inc..
Tohutoru Kātū Chicago (17th ed.)
Urwellen, Robert H. Oil Spill Costs and Impacts. New York: Nova Science Publishers, Inc., 2009.
Tohutoro MLA (9th ed.)
Urwellen, Robert H. Oil Spill Costs and Impacts. Nova Science Publishers, Inc., 2009.
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