Cita APA (7a ed.)

FARRELL, J. P., & KALLISTOS de Diokleia. (1989). Free Choice in St. Maximus the Confessor. St. Tikhon's Seminary Press.

Cita Chicago Style (17a ed.)

FARRELL, Joseph P., y KALLISTOS de Diokleia. Free Choice in St. Maximus the Confessor. South Canan, Penna: St. Tikhon's Seminary Press, 1989.

Cita MLA (9a ed.)

FARRELL, Joseph P., y KALLISTOS de Diokleia. Free Choice in St. Maximus the Confessor. St. Tikhon's Seminary Press, 1989.