APA

Lipuma C., Bullington L., Exxon, World Petroleum Congress (11th. : 1983 : London), Bullington L. & Exxon.Selecting the right bottoms conversion process. : .

Chicago

Lipuma C.R, Bullington L.A, Exxon, World Petroleum Congress (11th. : 1983 : London), Bullington L.A and Exxon.Selecting the right bottoms conversion process. : .

Harvard

Lipuma C., Bullington L., Exxon, World Petroleum Congress (11th. : 1983 : London), Bullington L. and Exxon.Selecting the right bottoms conversion process. : .

MLA

Lipuma C.R, Bullington L.A, Exxon, World Petroleum Congress (11th. : 1983 : London), Bullington L.A and Exxon.: . .