VIDYA PRAKASHAN. (2012). ENVIRONMENTAL STUDIES - BOOK 2. VIDYA PRAKASHAN MANDIR.
Chicago-čujuhus (17. p.)VIDYA PRAKASHAN. ENVIRONMENTAL STUDIES - BOOK 2. VIDYA PRAKASHAN MANDIR, 2012.
MLA-čujuhus (9. p.)VIDYA PRAKASHAN. ENVIRONMENTAL STUDIES - BOOK 2. VIDYA PRAKASHAN MANDIR, 2012.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.