Usher, G. (2021). Project management in the 21st century: What you need to know about the elephant, eco-system and experience. Springer.
Chicago-Zitierstil (17. Ausg.)Usher, Gregory. Project Management in the 21st Century: What You Need to Know About the Elephant, Eco-system and Experience. Cham: Springer, 2021.
MLA-Zitierstil (9. Ausg.)Usher, Gregory. Project Management in the 21st Century: What You Need to Know About the Elephant, Eco-system and Experience. Springer, 2021.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.