Sawan. (2019). Snowball learns about cleanliness Level 2 (2019.). Manoj Publications.
芝加哥风格引文Sawan. Snowball Learns About Cleanliness Level 2. 2019. Manoj Publications, 2019.
MLA引文Sawan. Snowball Learns About Cleanliness Level 2. 2019. Manoj Publications, 2019.
警告：这些引文格式不一定是100％准确.