Tolan, J. (1993). Petrus Alfonsi and his medieval readers. Univ. Press of Florida.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTolan, John. Petrus Alfonsi and His Medieval Readers. Gainesville, Fla.: Univ. Press of Florida, 1993.
एमएलए (8वां संस्करण) प्रशस्ति पत्रTolan, John. Petrus Alfonsi and His Medieval Readers. Univ. Press of Florida, 1993.
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