VIDYA PRAKASHAN. (2012). ENVIRONMENTAL STUDIES - BOOK 2. VIDYA PRAKASHAN MANDIR.
Chicagoスタイル(17版)引用形式VIDYA PRAKASHAN. ENVIRONMENTAL STUDIES - BOOK 2. VIDYA PRAKASHAN MANDIR, 2012.
MLA(9版)引用形式VIDYA PRAKASHAN. ENVIRONMENTAL STUDIES - BOOK 2. VIDYA PRAKASHAN MANDIR, 2012.
警告: この引用は必ずしも正確ではありません.