APA-viite (7. p.)

Ker, W. P. (1969). Medieval English literature ([1st ed.). Oxford U.P..

Chicago-viite (17. p.)

Ker, W. P. Medieval English Literature. [1st ed. London, New York: Oxford U.P., 1969.

MLA-viite (8. p.)

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