Dey, B. (1988). Quality circles: Concept and practices. Macmillian India.
Chicago-čujuhus (17. p.)Dey, B. Quality Circles: Concept and Practices. Delhi: Macmillian India, 1988.
MLA-čujuhus (9. p.)Dey, B. Quality Circles: Concept and Practices. Macmillian India, 1988.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.