APA (7th ed.) Citation

Hornby, A. S. (1970). Oxford progressive english alternative course: Book a. U. pr..

Chicago Style (17th ed.) Citation

Hornby, A. S. Oxford Progressive English Alternative Course: Book a. London: U. pr., 1970.

MLA (9th ed.) Citation

Hornby, A. S. Oxford Progressive English Alternative Course: Book a. U. pr., 1970.