O'Brien, I. (1978). Francis of Assisi: Mirror of Christ. Franciscan Herald Press.
Dyfyniad Arddull ChicagoO'Brien, Isidore. Francis of Assisi: Mirror of Christ. Chicago: Franciscan Herald Press, 1978.
Dyfyniad MLAO'Brien, Isidore. Francis of Assisi: Mirror of Christ. Franciscan Herald Press, 1978.
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