Maas, C. W., & Herde, P. (1981). The German Community in Renaissance Rome: Clifford W. Maas. Ed. by Peter Herde. Herder.

Maas, Clifford W., and Peter Herde. The German Community in Renaissance Rome: Clifford W. Maas. Ed. by Peter Herde. Freiburg [u.a.]: Herder, 1981.

Maas, Clifford W., and Peter Herde. The German Community in Renaissance Rome: Clifford W. Maas. Ed. by Peter Herde. Herder, 1981.