APA (7th ed.) Citation

任凯编著. (2018). 21天突破雅思听力. 电子工业出版社.

Chicago Style (17th ed.) Citation

任凯编著. 21天突破雅思听力. 电子工业出版社, 2018.

MLA (8th ed.) Citation

任凯编著. 21天突破雅思听力. 电子工业出版社, 2018.

Warning: These citations may not always be 100% accurate.