Ravindran, A., Phillips, D. T., & Solberg, J. J. (1987). Operations Research: Principles and Practice (2nd ed.). Modern Book Centre.

Ravindran, A., D. T. Phillips, and J. J. Solberg. Operations Research: Principles and Practice. 2nd ed. New York: Modern Book Centre, 1987.

Ravindran, A., et al. Operations Research: Principles and Practice. 2nd ed. Modern Book Centre, 1987.