Gregory I, P. (1472). [Liber epistolarum]. Gunther Zainer.
Lua i Stíl Chicago (17ú heag.)Gregory I, Pope. [Liber Epistolarum]. [Augsburg: Gunther Zainer, 1472.
Lua MLA (8ú heag.)Gregory I, Pope. [Liber Epistolarum]. Gunther Zainer, 1472.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.