Verma P.S. (1998). Environmental biology (rep. ed.). New Delhi: S.Chand.
Chicago Style CitationVerma P.S. Environmental Biology. rep. ed. New Delhi: S.Chand, 1998.
MLA CitationVerma P.S. Environmental Biology. rep. ed. New Delhi: S.Chand, 1998.
Warning: These citations may not always be 100% accurate.