Chesterton, G. K. (1957). St. Francis of Assisi. Image Books.
Lua i Stíl Chicago (17ú heag.)Chesterton, Gilbert Keith. St. Francis of Assisi. Garden City, N.Y: Image Books, 1957.
Lua MLA (9ú heag.)Chesterton, Gilbert Keith. St. Francis of Assisi. Image Books, 1957.
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