Dale, B. G. (1999). Managing quality (3rd ed.). Oxford: Blackwell Business.
Dyfyniad Arddull ChicagoDale, Barrie G.. Managing Quality. 3rd ed. Oxford: Blackwell Business, 1999.
Dyfyniad MLADale, Barrie G.. Managing Quality. 3rd ed. Oxford: Blackwell Business, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.