MALHOTRA, H. R. (2016). MATHS MAGIC - A BOOK ON MENTAL MATHS - BOOK 6. SOM SUDHA PUBLICATION.
Lua i Stíl Chicago (17ú heag.)MALHOTRA, H R. MATHS MAGIC - A BOOK ON MENTAL MATHS - BOOK 6. NEW DELHI: SOM SUDHA PUBLICATION, 2016.
Lua MLA (9ú heag.)MALHOTRA, H R. MATHS MAGIC - A BOOK ON MENTAL MATHS - BOOK 6. SOM SUDHA PUBLICATION, 2016.
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