Vollmann, T. E., Berry, W. L., Whybark, D. C., Berry, W. L., & Whybark, C. D. (1997). Manufacturing planning and control systems (4th ed.). New York: Irwin/McGraw-Hill.

Vollmann, Thomas E., William L. Berry, D. Clay Whybark, William L. Berry, and Clay D. Whybark. Manufacturing Planning and Control Systems. 4th ed. New York: Irwin/McGraw-Hill, 1997.

Vollmann, Thomas E., et al. Manufacturing Planning and Control Systems. 4th ed. New York: Irwin/McGraw-Hill, 1997.