Purpose: The Starting Point of Great Companies

Nikos Mourkogiannis, Roger Fisher

St. Martin's Griffin

Getting to Yes Negotiating Agreement Without Giving in

Penguin Group

Beyond Reason: Using Emotions as You Negotiate

Roger Fisher, Daniel Shapiro

Penguin Group.

Getting to Yes: Negotiating Agreement Without Giving in

Roger Fisher, William L. Ury, Bruce Patton

Penguin Books