World Health Organization. Guidelines for drinking-water quality , fourth edition incorporating the first addendum.
Lua i Stíl Chicago (17ú heag.)World Health Organization. Guidelines for Drinking-water Quality , Fourth Edition Incorporating the First Addendum.
Lua MLA (9ú heag.)World Health Organization. Guidelines for Drinking-water Quality , Fourth Edition Incorporating the First Addendum.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.