Cita APA (7th ed.)

Hornby, A. S. (1965). Oxford Progressive English Course. Oxford University Press.

Cita Chicago (17th ed.)

Hornby, A. S. Oxford Progressive English Course. London: Oxford University Press, 1965.

Cita MLA (9th ed.)

Hornby, A. S. Oxford Progressive English Course. Oxford University Press, 1965.