APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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