Levin, R. I. (1992). Quantitative approaches to management. McGraw-Hill.
Cita Chicago (17th ed.)Levin, Richard I. Quantitative Approaches to Management. New York: McGraw-Hill, 1992.
Cita MLA (9th ed.)Levin, Richard I. Quantitative Approaches to Management. McGraw-Hill, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.