Ingle, S. (1982). Quality circles master guide: Increasing productivity with people power. New York: Prentice-Hall.
Παραπομπή Chicago StyleIngle, Sud. Quality Circles Master Guide: Increasing Productivity With People Power. New York: Prentice-Hall, 1982.
Παραπομπή MLAIngle, Sud. Quality Circles Master Guide: Increasing Productivity With People Power. New York: Prentice-Hall, 1982.
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