Libros como The third side
Más de William Ury
Getting to yes1981
Getting past no1991
The Power of a Positive No2007
Como Chegar Ao Sim2010
Getting to yes with yourself2015
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
Comment réussir une négociation. Nouvelle édition2006