Competence profiles, Certification levels and Functions in the project management field - Based on ICB version 3 2nd edition - Henny Portman, Jan Willem Donselaar, Bert Hedeman - ebook27,20
Gestión de servicios TI basado en ITIL V3 - Jan van Bon, Arjen de Jong, Axel Kolthof, Mike Pieper, Ruby Tjassing, Annelies van der Veen, Tieneke Verheijen - ebook21,26