Cita APA (7th ed.)

Duff, A., & Maley, A. (1991). Literature. Oxford University Press.

Cita Chicago (17th ed.)

Duff, Alan, i Alan Maley. Literature. Oxford: Oxford University Press, 1991.

Cita MLA (9th ed.)

Duff, Alan, i Alan Maley. Literature. Oxford University Press, 1991.