APA

Lukefahr R., Donohue T., World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro B. & Donohue T.Is there real value in e-trading?. : .

Chicago

Lukefahr Robert, Donohue Tim, World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro Brasil) and Donohue Tim.Is there real value in e-trading?. : .

Harvard

Lukefahr R., Donohue T., World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro B. and Donohue T.Is there real value in e-trading?. : .

MLA

Lukefahr Robert, Donohue Tim, World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro Brasil) and Donohue Tim.: . .