APA (7th ed.) Citation

Ker, W. P. (1912). English literature: Medieval. H. Holt and Company; [etc., etc.].

Chicago Style (17th ed.) Citation

Ker, W. P. English Literature: Medieval. New York: H. Holt and Company; [etc., etc.], 1912.

MLA (9th ed.) Citation

Ker, W. P. English Literature: Medieval. H. Holt and Company; [etc., etc.], 1912.