Sumanth, D. J. (1994). Productivity engineering and management. New York: McGraw-Hill.
Dyfyniad Arddull ChicagoSumanth, David J. Productivity Engineering and Management. New York: McGraw-Hill, 1994.
Dyfyniad MLASumanth, David J. Productivity Engineering and Management. New York: McGraw-Hill, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.