Ecker, J. G. (1988). Introduction to operations research. John Wiley & Sons.
Cita Chicago (17th ed.)Ecker, Joseph G. Introduction to Operations Research. New York: John Wiley & Sons, 1988.
Cita MLA (9th ed.)Ecker, Joseph G. Introduction to Operations Research. John Wiley & Sons, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.