耿耿编著. (2015). 雅思分级词汇21天进阶. 浙江教育出版社.
Chicago Style (17th ed.) Citation耿耿编著. 雅思分级词汇21天进阶. 浙江教育出版社, 2015.
MLA (8th ed.) Citation耿耿编著. 雅思分级词汇21天进阶. 浙江教育出版社, 2015.
Warning: These citations may not always be 100% accurate.
APA (7th ed.) Citation