Kumar, H. D. (1997). Modern concepts of ecology (8th rev. ed.). Vikas Pub. House.
Lua i Stíl Chicago (17ú heag.)Kumar, H. D. Modern Concepts of Ecology. 8th rev. ed. New Delhi: Vikas Pub. House, 1997.
Lua MLA (8ú heag.)Kumar, H. D. Modern Concepts of Ecology. 8th rev. ed. Vikas Pub. House, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.