APA (7th ed.) Citation

Gregor IX., p., & Schöffer, P. (1473). F-Irmitet ideo dicit firmitet. Petrus schoiffer.

Chicago Style (17th ed.) Citation

Gregor IX., pápež, and Peter Schöffer. F-Irmitet Ideo Dicit Firmitet. Magūcia: Petrus schoiffer, 1473.

MLA (9th ed.) Citation

Gregor IX., pápež, and Peter Schöffer. F-Irmitet Ideo Dicit Firmitet. Petrus schoiffer, 1473.

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