All Change: Project Manager's Secret Handbook
Eddie Obeng
The Scrum Papers - Nut, Bolts, and Origins of an Agile Framework
Jeff Sutherland
Communications Skills for Project Managers
G. Michael Campbell
Market Research: The Process, Data, and Methods Using Stata
Marko Sarstedt & Erik Mooi & Irma Mooi-Reci
Process Excellence
Eva Best & Martin Weth
Die Malik ManagementSysteme - Grundlagen und Anwendung
Fredmund Malik