Willey, D. (2015). The promise of Francis: The man, the pope, and the challenge of change (First Gallery Books hardcover edition.). Gallery Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWilley, David. The Promise of Francis: The Man, the Pope, and the Challenge of Change. First Gallery Books hardcover edition. New York: Gallery Books, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWilley, David. The Promise of Francis: The Man, the Pope, and the Challenge of Change. First Gallery Books hardcover edition. Gallery Books, 2015.
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