Asay, S. F. (2015). Backflow prevention and cross-connection control: Recommended practices (Fourth edition.). American Water Works Association.
Chicago-Zitierstil (17. Ausg.)Asay, Stuart F. Backflow Prevention and Cross-connection Control: Recommended Practices. Fourth edition. Denver, Colorado: American Water Works Association, 2015.
MLA-Zitierstil (9. Ausg.)Asay, Stuart F. Backflow Prevention and Cross-connection Control: Recommended Practices. Fourth edition. American Water Works Association, 2015.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.