1
by Dräther, Rolf
Published 2014
O'Reilly Verlag

2
by Sammer, Petra, Heppel, Ulrike
Published 2015
Dpunkt.verlag

7
by Berkun, Scott
Published 2009
O'Reilly Verlag

8
by Hoppe, Michael H.
Published 2018
Center for Creative Leadership

9
Published 2024
Nomos Verlagsgesellschaft mbH & Co. KG