Joseph, B. (2005). Environmental studies. Tata McGraw Hill.
Lua i Stíl Chicago (17ú heag.)Joseph, Benny. Environmental Studies. New Delhi: Tata McGraw Hill, 2005.
Lua MLA (9ú heag.)Joseph, Benny. Environmental Studies. Tata McGraw Hill, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.