(2005). Modern UGC NET/SLET-Environmental science. Anmol.
Chicago Style aipamenaModern UGC NET/SLET-Environmental Science. New Delhi: Anmol, 2005.
MLA aipamenaModern UGC NET/SLET-Environmental Science. Anmol, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.