APA (7th ed.) Citation

Hornby, A. Oxford progressive english for adult Learners. Oxford University Press.

Chicago Style (17th ed.) Citation

Hornby, A.S. Oxford Progressive English for Adult Learners. London: Oxford University Press.

MLA (9th ed.) Citation

Hornby, A.S. Oxford Progressive English for Adult Learners. Oxford University Press.

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