Singh , A. (2006). Environment and water reources management. Adhyayan.
Lua i Stíl Chicago (17ú heag.)Singh , A. Environment and Water Reources Management. New Delhi: Adhyayan, 2006.
Lua MLA (9ú heag.)Singh , A. Environment and Water Reources Management. Adhyayan, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.