Raj, G. (1987). Dictionary of the environment. Anmol Publications.
Lua i Stíl Chicago (17ú heag.)Raj, Gurdeep. Dictionary of the Environment. New Delhi: Anmol Publications, 1987.
Lua MLA (8ú heag.)Raj, Gurdeep. Dictionary of the Environment. Anmol Publications, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.