Obtenga el síWilliam Ury, Roger Drummer Fisher, Bruce Patton, Aída Santapau · First published 2011Open the Tome
Como Chegar Ao SimRoger Drummer Fisher, William Ury, Bruce Patton · First published 2005 · Latest edition 2010Open the Tome
El Poder De Un No Positivo/ the Power of a Positive NoWilliam Ury · First published 2007Open the Tome
Das Harvard-KonzeptRoger Drummer Fisher, William Ury, Bruce Patton · First published 2004Open the Tome
