Rüegg, W. <. (1993). Mittelalter. Beck.
Lua i Stíl Chicago (17ú heag.)Rüegg, Walter <1918-2015>. Mittelalter. München: Beck, 1993.
Lua MLA (8ú heag.)Rüegg, Walter <1918-2015>. Mittelalter. Beck, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.