RATNA SAGAR. (2017). NUMBER MAGIC COMPANION - AN ACTVITY BASED COURSE IN MATHEMATICS - BOOK 2. RATNA SAGAR.
Chicago-referens (17:e uppl.)RATNA SAGAR. NUMBER MAGIC COMPANION - AN ACTVITY BASED COURSE IN MATHEMATICS - BOOK 2. NEW DELHI: RATNA SAGAR, 2017.
MLA-referens (9:e uppl.)RATNA SAGAR. NUMBER MAGIC COMPANION - AN ACTVITY BASED COURSE IN MATHEMATICS - BOOK 2. RATNA SAGAR, 2017.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.