O'Connell, J. B. (1949). The nine first Fridays: The "Great Promise" of the Sacred Heart of Jesus to Saint Margaret Mary (its origin, authenticity and meaning) (2nd ed.). Burns, Oates & Washbourne.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रO'Connell, John Berthram. The Nine First Fridays: The "Great Promise" of the Sacred Heart of Jesus to Saint Margaret Mary (its Origin, Authenticity and Meaning). 2nd ed. London: Burns, Oates & Washbourne, 1949.
एमएलए (8वां संस्करण) प्रशस्ति पत्रO'Connell, John Berthram. The Nine First Fridays: The "Great Promise" of the Sacred Heart of Jesus to Saint Margaret Mary (its Origin, Authenticity and Meaning). 2nd ed. Burns, Oates & Washbourne, 1949.
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