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.
Chicago Style (17th ed.) CitationO'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.
MLA (8th ed.) CitationO'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.
Warning: These citations may not always be 100% accurate.