کتاب های Roger Dawson
Secrets of Power Negotiating: inside secrets from a master negotiator
Roger Dawson, 2000
Secrets of Power Salary Negotiating: Inside Secrets from a Master Negotiator
Roger Dawson, 2006
Secrets of power persuasion for salespeople
Roger Dawson, 2004
Secrets of power problem solving
Roger Dawson, 2011
Resumen - Secretos de las negociaciones poderosas
Roger Dawson
