Loen, R. O. (1971). Manage more by doing less. McGraw Hill book co.
Dyfyniad Arddull ChicagoLoen, Raymond O. Manage More by Doing Less. New York: McGraw Hill book co, 1971.
Dyfyniad MLALoen, Raymond O. Manage More by Doing Less. McGraw Hill book co, 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.