APA

Ker W. P., . (1912). Medieval English literature. : Oxford University Press, London.

Chicago

Ker W P, . 1912. Medieval English literature. : Oxford University Press, London.

Harvard

Ker W. P., . (1912). Medieval English literature. : Oxford University Press, London.

MLA

Ker W P, . Medieval English literature. : Oxford University Press, London. 1912.