Goldratt, E. M., & Cox, J. (1992). The goal: Process of ongoing improvement (Second revised edition.). North River Press.

Goldratt, Eliyahu M., and Jeff Cox. The Goal: Process of Ongoing Improvement. Second revised edition. Great Barrington: North River Press, 1992.

Goldratt, Eliyahu M., and Jeff Cox. The Goal: Process of Ongoing Improvement. Second revised edition. North River Press, 1992.