Singh,Chanchal. (2007). Global warming and climatology. Akansha Pub. House.
Lua i Stíl Chicago (17ú heag.)Singh,Chanchal. Global Warming and Climatology. New Delhi, India: Akansha Pub. House, 2007.
Lua MLA (8ú heag.)Singh,Chanchal. Global Warming and Climatology. Akansha Pub. House, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.