Cita APA

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

Chicago Style Citation

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

Cita MLA

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

Atenció: Aquestes cites poden no estar 100% correctes.