APA

Gower B. G., Lyondell Petrochemical Company, World Petroleum Congress (13th. : 1991 : Buenos Aires) & Lyondell Petrochemical Company.Petrochemical economic developments. : .

Chicago

Gower Bob G, Lyondell Petrochemical Company, World Petroleum Congress (13th. : 1991 : Buenos Aires) and Lyondell Petrochemical Company.Petrochemical economic developments. : .

Harvard

Gower B. G., Lyondell Petrochemical Company, World Petroleum Congress (13th. : 1991 : Buenos Aires) and Lyondell Petrochemical Company.Petrochemical economic developments. : .

MLA

Gower Bob G, Lyondell Petrochemical Company, World Petroleum Congress (13th. : 1991 : Buenos Aires) and Lyondell Petrochemical Company.: . .