Cita APA (7th ed.)
Ullmann, W. (1967). The individual and society in the Middle Ages. Methuen.
Cita Chicago (17th ed.)
Ullmann, Walter. The Individual and Society in the Middle Ages. London: Methuen, 1967.
Cita MLA (9th ed.)
Ullmann, Walter. The Individual and Society in the Middle Ages. Methuen, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.