APA

Dale G. H., Phillips Petroleum Company, World Petroleum Congress (11th. : 1983 : London) & Phillips Petroleum Company.Heavy oil cracking. : .

Chicago

Dale Glenn H, Phillips Petroleum Company, World Petroleum Congress (11th. : 1983 : London) and Phillips Petroleum Company.Heavy oil cracking. : .

Harvard

Dale G. H., Phillips Petroleum Company, World Petroleum Congress (11th. : 1983 : London) and Phillips Petroleum Company.Heavy oil cracking. : .

MLA

Dale Glenn H, Phillips Petroleum Company, World Petroleum Congress (11th. : 1983 : London) and Phillips Petroleum Company.: . .