Agarwal, K. (1996). Environmental biology 1996-1997 (Revised Second Edition.). Agro Botanical Publishers.
Lua i Stíl Chicago (17ú heag.)Agarwal, K.C. Environmental Biology 1996-1997. Revised Second Edition. Bikaner: Agro Botanical Publishers, 1996.
Lua MLA (9ú heag.)Agarwal, K.C. Environmental Biology 1996-1997. Revised Second Edition. Agro Botanical Publishers, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.