DHINGRA PUBLISHING HOUSE. (2005). THE BIG BOOK OF SCIENCE PROJECTS. DHINGRA PUBLISHING HOUSE.
Chicago-čujuhus (17. p.)DHINGRA PUBLISHING HOUSE. THE BIG BOOK OF SCIENCE PROJECTS. NEW DELHI: DHINGRA PUBLISHING HOUSE, 2005.
MLA-čujuhus (9. p.)DHINGRA PUBLISHING HOUSE. THE BIG BOOK OF SCIENCE PROJECTS. DHINGRA PUBLISHING HOUSE, 2005.
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