APA

Quinn A. C., World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro B., .Long term contracts to opportunity markets. : .

Chicago

Quinn Anne C, World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro Brasil), .Long term contracts to opportunity markets. : .

Harvard

Quinn A. C., World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro B., .Long term contracts to opportunity markets. : .

MLA

Quinn Anne C, World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro Brasil), .: . .