APA (7th ed.) Citation

Hornby, A. S. (1956). Oxford Progressive English for Adult Learners. Oxford University Press.

Chicago Style (17th ed.) Citation

Hornby, A. S. Oxford Progressive English for Adult Learners. Oxford University Press, 1956.

MLA (8th ed.) Citation

Hornby, A. S. Oxford Progressive English for Adult Learners. Oxford University Press, 1956.

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