Cita APA (7a ed.)

Hill, L. A. (1966). Programmed english course. Oxford University Press.

Cita Chicago Style (17a ed.)

Hill, L.A. Autor. Programmed English Course. Londres: Oxford University Press, 1966.

Cita MLA (9a ed.)

Hill, L.A. Autor. Programmed English Course. Oxford University Press, 1966.