APA (7th ed.) Citation

Gagey, R., & Gagey, C. (1954). Histoire scandaleuse des Papes. Paris: Gagey.

Chicago Style (17th ed.) Citation

Gagey, R., and Ch Gagey. Histoire Scandaleuse Des Papes. Paris: Gagey, 1954.

MLA (8th ed.) Citation

Gagey, R., and Ch Gagey. Histoire Scandaleuse Des Papes. Paris: Gagey, 1954.

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