APA
Long G., Sobel J., Esso, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston), Sobel J. & ESSO.Factors influencing selection of octane improvement steps in Europe. : .
Chicago
Long G.H, Sobel J.E, Esso, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston), Sobel J.E and ESSO.Factors influencing selection of octane improvement steps in Europe. : .
Harvard
Long G., Sobel J., Esso, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston), Sobel J. and ESSO.Factors influencing selection of octane improvement steps in Europe. : .
MLA
Long G.H, Sobel J.E, Esso, World Petroleum Congress (12th : 1987 26 abr/1 may : Houston), Sobel J.E and ESSO.: . .
