Gaither, N., & Frazier, G. (2004). Operations management (9th ed. (Indian ed.).). South-Western/Thomson Learning ; Cengage Learning.

Gaither, Norman, and Greg Frazier. Operations Management. 9th ed. (Indian ed.). Australia ; Cincinnati, Ohio : New Delhi: South-Western/Thomson Learning ; Cengage Learning, 2004.

Gaither, Norman, and Greg Frazier. Operations Management. 9th ed. (Indian ed.). South-Western/Thomson Learning ; Cengage Learning, 2004.