APA (7th ed.) Citation

Gregory IX, P. (1533). Decretales epistolae. Francoys Fradin [Excudebat Franciscus Fradin impensis Hugonis de Porta].

Chicago Style (17th ed.) Citation

Gregory IX, Pope. Decretales Epistolae. [Lugduni]: Francoys Fradin [Excudebat Franciscus Fradin impensis Hugonis de Porta], 1533.

MLA (9th ed.) Citation

Gregory IX, Pope. Decretales Epistolae. Francoys Fradin [Excudebat Franciscus Fradin impensis Hugonis de Porta], 1533.

Warning: These citations may not always be 100% accurate.