APA
Freund P., World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro B., .Technology for avoiding CO2 emissions. : .
Chicago
Freund Paul, World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro Brasil), .Technology for avoiding CO2 emissions. : .
Harvard
Freund P., World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro B., .Technology for avoiding CO2 emissions. : .
MLA
Freund Paul, World Petroleum Congress (17th. : 2002 sept. 1-5 : Río de Janeiro Brasil), .: . .
