Cita APA (7a ed.)

Rüegg, W. <. (1993). Mittelalter. Beck.

Cita Chicago Style (17a ed.)

Rüegg, Walter <1918-2015>. Mittelalter. München: Beck, 1993.

Cita MLA (8a ed.)

Rüegg, Walter <1918-2015>. Mittelalter. Beck, 1993.