Zimmermann, R., Wagner, G., & Finck, M. Guidelines for the use of biological monitors in air pollution control (plants). WHO Collab. Centre for Air Quality Management and Air Pollution Control, Federal Environmental Agency.
Chicago-Zitierstil (17. Ausg.)Zimmermann, Ralf-Dieter, Gerhard Wagner, und Markus Finck. Guidelines for the Use of Biological Monitors in Air Pollution Control (plants). Berlin: WHO Collab. Centre for Air Quality Management and Air Pollution Control, Federal Environmental Agency.
MLA-Zitierstil (9. Ausg.)Zimmermann, Ralf-Dieter, et al. Guidelines for the Use of Biological Monitors in Air Pollution Control (plants). WHO Collab. Centre for Air Quality Management and Air Pollution Control, Federal Environmental Agency.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.