RATNA SAGAR. (2017). NUMBER MAGIC COMPANION - AN ACTVITY BASED COURSE IN MATHEMATICS - BOOK 2. RATNA SAGAR.
芝加哥风格引文RATNA SAGAR. NUMBER MAGIC COMPANION - AN ACTVITY BASED COURSE IN MATHEMATICS - BOOK 2. NEW DELHI: RATNA SAGAR, 2017.
MLA引文RATNA SAGAR. NUMBER MAGIC COMPANION - AN ACTVITY BASED COURSE IN MATHEMATICS - BOOK 2. RATNA SAGAR, 2017.
警告：这些引文格式不一定是100％准确.