Nair, P. (1990). Principles of environmental biology. Himalaya Pub House.
Lua i Stíl Chicago (17ú heag.)Nair, P. Principles of Environmental Biology. Delhi: Himalaya Pub House, 1990.
Lua MLA (9ú heag.)Nair, P. Principles of Environmental Biology. Himalaya Pub House, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.