RATNA SAGAR. (2013). RAINDROPS AN INTEGRATED SKILLS- BASED COURSE IN ENGLISH WORKBOOK - 1. RATNA SAGAR.
芝加哥风格引文RATNA SAGAR. RAINDROPS AN INTEGRATED SKILLS- BASED COURSE IN ENGLISH WORKBOOK - 1. RATNA SAGAR, 2013.
MLA引文RATNA SAGAR. RAINDROPS AN INTEGRATED SKILLS- BASED COURSE IN ENGLISH WORKBOOK - 1. RATNA SAGAR, 2013.
警告：这些引文格式不一定是100％准确.