Volkema, R. J. (2006). Leverage: How to get it and how to keep it in any negotiation. Amacom.
Chicago Style aipamenaVolkema, Roger J. Leverage: How to Get It and How to Keep It in Any Negotiation. Amacom, 2006.
MLA aipamenaVolkema, Roger J. Leverage: How to Get It and How to Keep It in Any Negotiation. Amacom, 2006.
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