Krishnamoorthy Bala. (2014). Environmental Management (2nd.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Krishnamoorthy Bala. Environmental Management. 2nd. New Delhi: Prentice Hall, 2014.
Lua MLA (9ú heag.)Krishnamoorthy Bala. Environmental Management. 2nd. Prentice Hall, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.