APA

Horowitz F., Epperly W., Exxon, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston), Epperly W. & Exxon.Future technological opportunities for an optimized refining industry. : .

Chicago

Horowitz F.A, Epperly W.R, Exxon, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston), Epperly W.R and Exxon.Future technological opportunities for an optimized refining industry. : .

Harvard

Horowitz F., Epperly W., Exxon, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston), Epperly W. and Exxon.Future technological opportunities for an optimized refining industry. : .

MLA

Horowitz F.A, Epperly W.R, Exxon, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston), Epperly W.R and Exxon.: . .