APA(7版)引用形式

Gregory I, P. (1472). [Liber epistolarum]. Gunther Zainer.

Chicagoスタイル(17版)引用形式

Gregory I, Pope. [Liber Epistolarum]. [Augsburg: Gunther Zainer, 1472.

MLA(8版)引用形式

Gregory I, Pope. [Liber Epistolarum]. Gunther Zainer, 1472.