APA

Olschewski K. H., World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest), .A review of energy saving opportunities beyond the refinery. : .

Chicago

Olschewski Karl Heinz, World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest), .A review of energy saving opportunities beyond the refinery. : .

Harvard

Olschewski K. H., World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest), .A review of energy saving opportunities beyond the refinery. : .

MLA

Olschewski Karl Heinz, World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest), .: . .