Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Waterguard:

"

Prior to 1972, the basic grade in the Waterguard was that of Assistant Preventive Officer, and advancement could be made through the ranks to the grades of Preventive Officer then Chief Preventive Officer, initially by way of written examination then interview. Further advancement was possible within the Waterguard structure, up to the highest grade of Inspector General of Waterguard.