Lua APA (7ú heag.)
Urwellen, R. H. (2009). Oil spill costs and impacts. Nova Science Publishers, Inc..
Lua i Stíl Chicago (17ú heag.)
Urwellen, Robert H. Oil Spill Costs and Impacts. New York: Nova Science Publishers, Inc., 2009.
Lua MLA (9ú heag.)
Urwellen, Robert H. Oil Spill Costs and Impacts. Nova Science Publishers, Inc., 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.