Esso Standard Oil Company & Symonds, G. H. Linear programming: The solution of refinery problems. s.n.
Cita Chicago (17th ed.)Esso Standard Oil Company i Gifford H. Symonds. Linear Programming: The Solution of Refinery Problems. New York: s.n.
Cita MLA (9th ed.)Esso Standard Oil Company i Gifford H. Symonds. Linear Programming: The Solution of Refinery Problems. s.n.
Atenció: Aquestes cites poden no estar 100% correctes.