APA (7th ed.) Citation

Riché, P. (1987). Gerbert d'Aurillac: Le pape de l'an mil. Fayard.

Chicago Style (17th ed.) Citation

Riché, Pierre. Gerbert D'Aurillac: Le Pape De L'an Mil. Paris: Fayard, 1987.

MLA (9th ed.) Citation

Riché, Pierre. Gerbert D'Aurillac: Le Pape De L'an Mil. Fayard, 1987.

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