APA (7th ed.) Citation

Silvester, I., Riché, P., & Silvester II. Papst 950-1003. (1993). Correspondance. Les Belles Lettres.

Chicago Style (17th ed.) Citation

Silvester, II., Pierre Riché, and Silvester II. Papst 950-1003. Correspondance. Paris: Les Belles Lettres, 1993.

MLA (9th ed.) Citation

Silvester, II., et al. Correspondance. Les Belles Lettres, 1993.

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