APA

Virk K. S., ESSO Petroleum Canada, World Petroleum Congress (13th. : 1991 : Buenos Aires) & ESSO Petroleum Canada.Synergism of refinery wastes in biotreatment. : .

Chicago

Virk Kal S, ESSO Petroleum Canada, World Petroleum Congress (13th. : 1991 : Buenos Aires) and ESSO Petroleum Canada.Synergism of refinery wastes in biotreatment. : .

Harvard

Virk K. S., ESSO Petroleum Canada, World Petroleum Congress (13th. : 1991 : Buenos Aires) and ESSO Petroleum Canada.Synergism of refinery wastes in biotreatment. : .

MLA

Virk Kal S, ESSO Petroleum Canada, World Petroleum Congress (13th. : 1991 : Buenos Aires) and ESSO Petroleum Canada.: . .