Goldratt, E. M., Schragenheim, E., & Ptak, C. A. (2000). Necessary but not Sufficient: A Theory of Constraints Business Novel. North River Press.
Čikaški stil citiranja (17. izdanje)Goldratt, Eliyahu M., Eli Schragenheim, i Carol A. Ptak. Necessary but Not Sufficient: A Theory of Constraints Business Novel. Great Barrington, MA: North River Press, 2000.
MLA način citiranja (9. izdanje)Goldratt, Eliyahu M., et al. Necessary but Not Sufficient: A Theory of Constraints Business Novel. North River Press, 2000.
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