APA

Jakob K., World Petroleum Congress (13th. : 1991 : Buenos Aires), .Challenges and reactions in the petroleum processing industry of a central european country. : .

Chicago

Jakob Károly, World Petroleum Congress (13th. : 1991 : Buenos Aires), .Challenges and reactions in the petroleum processing industry of a central european country. : .

Harvard

Jakob K., World Petroleum Congress (13th. : 1991 : Buenos Aires), .Challenges and reactions in the petroleum processing industry of a central european country. : .

MLA

Jakob Károly, World Petroleum Congress (13th. : 1991 : Buenos Aires), .: . .