Narayanan, P. (2007). Enviromental polution: Principles, analysis and control. CBS Pub.
Lua i Stíl Chicago (17ú heag.)Narayanan, P. Enviromental Polution: Principles, Analysis and Control. New Delhi: CBS Pub, 2007.
Lua MLA (8ú heag.)Narayanan, P. Enviromental Polution: Principles, Analysis and Control. CBS Pub, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.