Khan,S.H. (1987). Teacher's guide environmental studies. Rakesh press.
Čikaški stil citiranjaKhan,S.H. Teacher's Guide Environmental Studies. New delhi: Rakesh press, 1987.
MLA način citiranjaKhan,S.H. Teacher's Guide Environmental Studies. Rakesh press, 1987.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.