Videotip 27 By AdministratorVideotips Science Of Persuasion . . Robert Cialdini Influence at work 22 maart 2017 Love0
Boektip 39 By AdministratorBoektips Brain Rules 12 Principles for Surviving and Thriving… John Medina Pear Press 9780979777707 . . . . 15 maart 2017 Love0