Water Pollution Control Federation. (1981). WPCF wasterwater treatment skill training package: Anaerobic digestion administration guide. Water Pollution Control Federation.
Chicago-Zitierstil (17. Ausg.)Water Pollution Control Federation. WPCF Wasterwater Treatment Skill Training Package: Anaerobic Digestion Administration Guide. Washington, D.C: Water Pollution Control Federation, 1981.
MLA-Zitierstil (9. Ausg.)Water Pollution Control Federation. WPCF Wasterwater Treatment Skill Training Package: Anaerobic Digestion Administration Guide. Water Pollution Control Federation, 1981.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.