RATNA SAGAR. (2013). NUMBER MAGIC COMPANION A COMPLETE RESOURCE FOR TEACHERS- 3. RATNA SAGAR.
芝加哥风格引文RATNA SAGAR. NUMBER MAGIC COMPANION A COMPLETE RESOURCE FOR TEACHERS- 3. RATNA SAGAR, 2013.
MLA引文RATNA SAGAR. NUMBER MAGIC COMPANION A COMPLETE RESOURCE FOR TEACHERS- 3. RATNA SAGAR, 2013.
警告：这些引文格式不一定是100％准确.