Παραπομπή σε μορφή APA (7η εκδ.)

Goldratt, E. M., Schragenheim, E., & Ptak, C. A. (2000). Necessary but not Sufficient: A Theory of Constraints Business Novel. North River Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Goldratt, Eliyahu M., Eli Schragenheim, και Carol A. Ptak. Necessary but Not Sufficient: A Theory of Constraints Business Novel. Great Barrington, MA: North River Press, 2000.

Παραπομπή σε μορφή MLA (9th εκδ.)

Goldratt, Eliyahu M., et al. Necessary but Not Sufficient: A Theory of Constraints Business Novel. North River Press, 2000.