The Scrum Papers - Nut, Bolts, and Origins of an Agile Framework
Jeff Sutherland
The Standard for Portfolio Management
Project Management Institute
Agile Practice Guide
Redesigning the Future: A Systems Approach to Societal Problems
Russell Lincoln Ackoff
Risikomanagement - Prozesse und Organisation
Werner Gleißner & Thomas Berger
Market Research: The Process, Data, and Methods Using Stata
Erik Mooi & Marko Sarstedt & Irma Mooi-Reci