PMP: Project Management Professional Exam Study Guide
Kim Heldman
PMP® Exam Preparation
Ginger Levin
Faktencheck Nachhaltigkeit
Thomas Unnerstall
The Email Fortress - Secure your Inbox, Protect Your Privacy
Gavin Phillips
A Guide to the Project Management Body of Knowledge
Project Management Institute, Inc.
The Scrum Guide
Ken Schwaber
Scrum Basics