GUPTA. K. K. (2012). FRANK MODERN CERTIFICATE CHEMISTRY FOR MIDDLE SCHOOL CLASS- 8 ( 2013- 14 ). FRANK BROS.
Chicago-čujuhus (17. p.)GUPTA. K. K. FRANK MODERN CERTIFICATE CHEMISTRY FOR MIDDLE SCHOOL CLASS- 8 ( 2013- 14 ). FRANK BROS, 2012.
MLA-čujuhus (9. p.)GUPTA. K. K. FRANK MODERN CERTIFICATE CHEMISTRY FOR MIDDLE SCHOOL CLASS- 8 ( 2013- 14 ). FRANK BROS, 2012.
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