Livres comme Comment négocier avec les gens difficiles
Autres livres de William Ury
Getting to yes1981
Getting past no1991
The Power of a Positive No2007
Como Chegar Ao Sim2010
Getting to yes with yourself2015
The third side2000
Obtenga el sí2011
Getting disputes resolved1988
Getting to peace1999
Must We Fight?2001
El Poder De Un No Positivo/ the Power of a Positive No2007
Das Harvard-Konzept2004