Cita APA

Collins. (2013). Work on your grammar (Upper Intermediate B2): Over 200 exercises to improve your English grammar. Tổng hợp.

Chicago Style Citation

Collins. Work On Your Grammar (Upper Intermediate B2): Over 200 Exercises to Improve Your English Grammar. Tổng hợp, 2013.

Cita MLA

Collins. Work On Your Grammar (Upper Intermediate B2): Over 200 Exercises to Improve Your English Grammar. Tổng hợp, 2013.