Ullmen, Dr. John books & textbook
Real Influence: Persuade Without Pushing and Gain Without Giving In
Goulston, Mark Ullmen, Dr. John
AMACOM /2022-09-06 Paperback / 272 Pages
isbn-10: 1400238838 / isbn-13: 9781400238835
Who Wins Conflict?
Ullmen PhD, Dr John Rupert M S, Glenn
Xlibris /2009-05-11 Hardcover / 192 Pages
isbn-10: 1441517359 / isbn-13: 9781441517357
