The Linux Commands Reference Cheat Sheet
MakeUseOf
Overcoming Procrastination - Productivity Skills
Team FME
The Standard for Portfolio Management
Project Management Institute
Customer Data Platforms: A Marketer's Guide
Martech
Project Management: The Managerial Process
Clifford F. Gray & Erik W. Larson
Der Change Manager: Sich selbst und andere verändern
Klaus Doppler