APA引文

Collins. (2013). Work on your grammar (Elementary A1): Over 200 exercises to improve your English grammar. Tổng hợp.

Trích dẫn kiểu Chicago

Collins. Work On Your Grammar (Elementary A1): Over 200 Exercises to Improve Your English Grammar. Tổng hợp, 2013.

MLA引文

Collins. Work On Your Grammar (Elementary A1): Over 200 Exercises to Improve Your English Grammar. Tổng hợp, 2013.

警告：这些引文格式不一定是100％准确.