Kals, J. (2015). ISO 50001 energy management systems: What managers need to know about energy and business administration. Business Expert Press.
Chicago-Zitierstil (17. Ausg.)Kals, Johannes. ISO 50001 Energy Management Systems: What Managers Need to Know About Energy and Business Administration. New York: Business Expert Press, 2015.
MLA-Zitierstil (9. Ausg.)Kals, Johannes. ISO 50001 Energy Management Systems: What Managers Need to Know About Energy and Business Administration. Business Expert Press, 2015.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.