Ingle, S. (1982). Quality circles master guide: Increasing productivity with people power. Prentice-Hall.
Čikaški stil citiranja (17. izdanje)Ingle, Sud. Quality Circles Master Guide: Increasing Productivity with People Power. Englewood Cliffs, N.J.: Prentice-Hall, 1982.
MLA način citiranja (8. izdanje)Ingle, Sud. Quality Circles Master Guide: Increasing Productivity with People Power. Prentice-Hall, 1982.
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