APA (7th ed.) Citation

DAVIS, R. (1957). A history of medieval Europe: From Constantine to Saint Louis. Longmans.

Chicago Style (17th ed.) Citation

DAVIS, R.H.C. A History of Medieval Europe: From Constantine to Saint Louis. London: Longmans, 1957.

MLA (9th ed.) Citation

DAVIS, R.H.C. A History of Medieval Europe: From Constantine to Saint Louis. Longmans, 1957.