Krajewski, L. J., & Ritzman, L. P. (2002). Operations management: Strategy and analysis (6th ed.). Pearson Education Asia.

Krajewski, Lee J., and Larry P. Ritzman. Operations Management: Strategy and Analysis. 6th ed. New Delhi,India: Pearson Education Asia, 2002.

Krajewski, Lee J., and Larry P. Ritzman. Operations Management: Strategy and Analysis. 6th ed. Pearson Education Asia, 2002.