Universidad Tecnológica de El Salvador

William Ury

9 Book

Getting to Yes with Yourself
And Other Worthy Opponents
William Ury
Harper, 2015
8 Book

Getting Past No
Negotiating in Difficult Situations
William Ury
Bantam, 1993
8 Book

The Power of a Positive No
How to Say No and Still Get to Yes
William Ury
Bantam Dell, 2007
9 Book

Getting to Yes
Negotiating Agreement Without Giving In
Roger Fisher et al.
Penguin, 1991