APA

Stephenson C., . (1951). Mediæval history: Europe from the second to the sixteenth century. New York: Harper.

Chicago

Stephenson Carl, . 1951. Mediæval history: Europe from the second to the sixteenth century. New York: Harper.

Harvard

Stephenson C., . (1951). Mediæval history: Europe from the second to the sixteenth century. New York: Harper.

MLA

Stephenson Carl, . Mediæval history: Europe from the second to the sixteenth century. New York: Harper. 1951.