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Dyfyniad Arddull ChicagoHoltz, Herman. How to Succeed As an Independent Consultant. Hoboken, N.J: John Wiley & Sons, Inc, 2004.
Dyfyniad MLAHoltz, Herman. How to Succeed As an Independent Consultant. Hoboken, N.J: John Wiley & Sons, Inc, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.