(2020). 作文素材．2020,no. 18,21.
Chicago Style (17th ed.) Citation作文素材．2020,no. 18,21. 2020.
MLA引文作文素材．2020,no. 18,21. 2020.
警告：这些引文格式不一定是100％准确.
APA引文
(2020). 作文素材．2020,no. 18,21.
Chicago Style (17th ed.) Citation作文素材．2020,no. 18,21. 2020.
MLA引文作文素材．2020,no. 18,21. 2020.