Levin, R. I., Kirkpatrick, C. A., & Rubin, D. S. (1982). Quantitative approaches to management (5th ed.). McGraw Hill.

Levin, Richard I., Charles A. Kirkpatrick, and David S. Rubin. Quantitative Approaches to Management. 5th ed. New York: McGraw Hill, 1982.

Levin, Richard I., et al. Quantitative Approaches to Management. 5th ed. McGraw Hill, 1982.