APA (7th ed.) Citation

BARRALL, I. Powerbase Beginner: Teacher-s book. Longman.

Chicago Style (17th ed.) Citation

BARRALL, Irene. Powerbase Beginner: Teacher-s Book. Longman.

MLA (8th ed.) Citation

BARRALL, Irene. Powerbase Beginner: Teacher-s Book. Longman.

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