Cita APA (7a ed.)

Ker, W. (1969). Medieval English literature (1st. ed.). Oxford University.

Cita Chicago Style (17a ed.)

Ker, W.P. Medieval English Literature. 1st. ed. London: Oxford University, 1969.

Cita MLA (9a ed.)

Ker, W.P. Medieval English Literature. 1st. ed. Oxford University, 1969.