Barthwal, R. (2009). Environmental Impact Assessment. New Age International.
Lua i Stíl Chicago (17ú heag.)Barthwal, R.R. Environmental Impact Assessment. New Delhi: New Age International, 2009.
Lua MLA (9ú heag.)Barthwal, R.R. Environmental Impact Assessment. New Age International, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.