The Standard for Organizational Project Management (OPM)
Project Management Institute
Introducing Qualitative Research in Psychology
Willig, Carla
Die Malik ManagementSysteme - Grundlagen und Anwendung
Fredmund Malik
The Standard for Portfolio Management
Decode and Conquer: Answers to Product Management Interviews
Lewis C. Lin
Practical Security for Agile and DevOps
Mark S. Merkow