Goldratt, E. M. (2006). Necessary but not Sufficient. Productivity and Quality Pub-Madras.
Cita Chicago (17th ed.)Goldratt, Eliyahu M. Necessary but Not Sufficient. Productivity and Quality Pub-Madras, 2006.
Cita MLA (9th ed.)Goldratt, Eliyahu M. Necessary but Not Sufficient. Productivity and Quality Pub-Madras, 2006.
Atenció: Aquestes cites poden no estar 100% correctes.