Ongley, E. D. Control of water pollution from agriculture. FAO.
Lua i Stíl Chicago (17ú heag.)Ongley, Edwin D. Control of Water Pollution from Agriculture. FAO.
Lua MLA (8ú heag.)Ongley, Edwin D. Control of Water Pollution from Agriculture. FAO.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.