APA (7th ed.) Citation

Cyril, S., & O'Keefe, J. J. (2009). Festal letters 1-12. Catholic University of America Press.

Chicago Style (17th ed.) Citation

Cyril, Saint, and John J. O'Keefe. Festal Letters 1-12. Washington, D.C.: Catholic University of America Press, 2009.

MLA (9th ed.) Citation

Cyril, Saint, and John J. O'Keefe. Festal Letters 1-12. Catholic University of America Press, 2009.