APA (7th ed.) Citation

Μπέτσης Ανδρέας & Mamas Lawrence. (2016). Natural english grammar: Beginners. Global ELT.

Chicago Style (17th ed.) Citation

Μπέτσης Ανδρέας and Mamas Lawrence. Natural English Grammar: Beginners. Global ELT, 2016.

MLA (8th ed.) Citation

Μπέτσης Ανδρέας and Mamas Lawrence. Natural English Grammar: Beginners. Global ELT, 2016.

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