Calificación: 4 de 5 estrellas
4/5
Cargando
JC![]()
author
Jack Collis
Jack Collis, a former International Marketing Manager for AMP, is a successful speaker, author and business consultant. He has developed and published specialist training programs ...ver másJack Collis, a former International Marketing Manager for AMP, is a successful speaker, author and business consultant. He has developed and published specialist training programs for leading organizations, and is the author of several best-selling books including Yes You Can and Work Smarter. Not Harder. He lives in Sydney.ver menos