RATNA SAGAR. (2017). NUMBER MAGIC COMPANION - AN ACTVITY BASED COURSE IN MATHEMATICS - BOOK 2. RATNA SAGAR.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRATNA SAGAR. NUMBER MAGIC COMPANION - AN ACTVITY BASED COURSE IN MATHEMATICS - BOOK 2. NEW DELHI: RATNA SAGAR, 2017.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRATNA SAGAR. NUMBER MAGIC COMPANION - AN ACTVITY BASED COURSE IN MATHEMATICS - BOOK 2. RATNA SAGAR, 2017.
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