Carroll, M. G., & Albaret, P. d. L. (1974). Three studies in simplicity: Padre Pio, Martin de Porres, Benedict the Black. Franciscan Herald Press.
Čikaški stil citiranja (17. izdanje)Carroll, Malachy Gerard, i Pol de Léon Albaret. Three Studies in Simplicity: Padre Pio, Martin De Porres, Benedict the Black. Chicago: Franciscan Herald Press, 1974.
MLA način citiranja (8. izdanje)Carroll, Malachy Gerard, i Pol de Léon Albaret. Three Studies in Simplicity: Padre Pio, Martin De Porres, Benedict the Black. Franciscan Herald Press, 1974.
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