Sarkar, D. N. (2009). Environmental Studies F.Y.B.Com (1st edn.). Himalaya Publishing House.
Lua i Stíl Chicago (17ú heag.)Sarkar, D. N. Environmental Studies F.Y.B.Com. 1st edn. Mumbai: Himalaya Publishing House, 2009.
Lua MLA (9ú heag.)Sarkar, D. N. Environmental Studies F.Y.B.Com. 1st edn. Himalaya Publishing House, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.