APA (7th ed.) Citation

Pennington, K. (1993). Popes, canonists, and texts, 1150-1550. Variorum.

Chicago Style (17th ed.) Citation

Pennington, Kenneth. Popes, Canonists, and Texts, 1150-1550. Aldershot, Hampshire, Great Britain ; Brookfield, Vt., USA: Variorum, 1993.

MLA (9th ed.) Citation

Pennington, Kenneth. Popes, Canonists, and Texts, 1150-1550. Variorum, 1993.