Volkema, R. J. (2008). Negotiation toolkit: How to get exactly what you want in any business or professional situation.
Styl ChicagoVolkema, Roger J. Negotiation Toolkit: How to Get Exactly What You Want in Any Business or Professional Situation. PHI learning Private Ltd, 2008.
Citace podle MLAVolkema, Roger J. Negotiation Toolkit: How to Get Exactly What You Want in Any Business or Professional Situation. 2008.
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