Cita APA (7a ed.)

Keen, M. H. (1977). England in the later Middle Ages: A political history. Methuen.

Cita Chicago Style (17a ed.)

Keen, Maurice Hugh. England in the Later Middle Ages: A Political History. London: Methuen, 1977.

Cita MLA (9a ed.)

Keen, Maurice Hugh. England in the Later Middle Ages: A Political History. Methuen, 1977.