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Dyfyniad Arddull Chicagoel hefny, amina. Decision Making Systems in Management. cairo: National Planning Institute, 1965.
Dyfyniad MLAel hefny, amina. Decision Making Systems in Management. National Planning Institute, 1965.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.