APA (7th ed.) Citation

Puchta, H. (2019). Grammar practice - intermediate: A complete grammar workout for teens. Helbling.

Chicago Style (17th ed.) Citation

Puchta, Herbert. Grammar Practice - Intermediate: A Complete Grammar Workout for Teens. Inglaterra: Helbling, 2019.

MLA (9th ed.) Citation

Puchta, Herbert. Grammar Practice - Intermediate: A Complete Grammar Workout for Teens. Helbling, 2019.