Catherine, o. G. (1880). The treatise on purgatory (3d ed.). Burns & Oates, Catholic Publication Society.
Chicago-viite (17. p.)Catherine, of Genoa. The Treatise on Purgatory. 3d ed. London, New York: Burns & Oates, Catholic Publication Society, 1880.
MLA-viite (8. p.)Catherine, of Genoa. The Treatise on Purgatory. 3d ed. Burns & Oates, Catholic Publication Society, 1880.
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