Kottwitz, E. (1981). Roland, der Ries'. Brockhaus.
Cita Chicago (17th ed.)Kottwitz, Eberhard. Roland, Der Ries'. Leipzig: Brockhaus, 1981.
Cita MLA (8th ed.)Kottwitz, Eberhard. Roland, Der Ries'. Brockhaus, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.