APA-referens (7:e uppl.)

Carroll, M. G., & Albaret, P. d. L. (1974). Three studies in simplicity: Padre Pio, Martin de Porres, Benedict the Black. Franciscan Herald Press.

Chicago-referens (17:e uppl.)

Carroll, Malachy Gerard, och Pol de Léon Albaret. Three Studies in Simplicity: Padre Pio, Martin De Porres, Benedict the Black. Chicago: Franciscan Herald Press, 1974.

MLA-referens (8:e uppl.)

Carroll, Malachy Gerard, och Pol de Léon Albaret. Three Studies in Simplicity: Padre Pio, Martin De Porres, Benedict the Black. Franciscan Herald Press, 1974.