Ross, J. E. (1982). Japanese quality circles and productivity. Reston, Va: Reston Pub. Co.
Dyfyniad Arddull ChicagoRoss, Joel E. Japanese Quality Circles and Productivity. Reston, Va: Reston Pub. Co, 1982.
Dyfyniad MLARoss, Joel E. Japanese Quality Circles and Productivity. Reston, Va: Reston Pub. Co, 1982.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.