Ilich, J. (1992). Dealbreakers and breakthroughs: The ten most common and costly negotiation mistakes and how to overcome them. Wiley.
Dyfyniad Arddull ChicagoIlich, John. Dealbreakers and Breakthroughs: The Ten Most Common and Costly Negotiation Mistakes and How to Overcome Them. New York: Wiley, 1992.
Dyfyniad MLAIlich, John. Dealbreakers and Breakthroughs: The Ten Most Common and Costly Negotiation Mistakes and How to Overcome Them. Wiley, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.