Gitlow, H., Oppenheim, A., & Oppenheim, R. (1995). Quality management: Tools and methods. Irwin.
Cita Chicago (17th ed.)Gitlow, Howard, Alan Oppenheim, i Rosa Oppenheim. Quality Management: Tools and Methods. Burr Ridge, ILL: Irwin, 1995.
Cita MLA (9th ed.)Gitlow, Howard, et al. Quality Management: Tools and Methods. Irwin, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.