Khan,S.H. (1987). Teacher's guide environmental studies. Rakesh press.
シカゴスタイル引用形Khan,S.H. Teacher's Guide Environmental Studies. New delhi: Rakesh press, 1987.
MLA引用形式Khan,S.H. Teacher's Guide Environmental Studies. Rakesh press, 1987.
警告: この引用は必ずしも正確ではありません.