Chandra, D. (1991). Quality circles. Tata Mc Graw Hill.
Chicago-čujuhus (17. p.)Chandra, Durgesh. Quality Circles. New Delhi: Tata Mc Graw Hill, 1991.
MLA-čujuhus (9. p.)Chandra, Durgesh. Quality Circles. Tata Mc Graw Hill, 1991.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.