Cita APA (7th ed.)

Hill, L. (1968). Intermediate refresher course. Oxford University Pr.

Cita Chicago (17th ed.)

Hill, L.A. Intermediate Refresher Course. London: Oxford University Pr, 1968.

Cita MLA (9th ed.)

Hill, L.A. Intermediate Refresher Course. Oxford University Pr, 1968.