APA (7th ed.) Citation

Puchta, H. (2019). Grammar practice: Elementary. Helbling Languages.

Chicago Style (17th ed.) Citation

Puchta, Herbert. Grammar Practice: Elementary. Inglaterra: Helbling Languages, 2019.

MLA (9th ed.) Citation

Puchta, Herbert. Grammar Practice: Elementary. Helbling Languages, 2019.

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