Catholic Church. Pope & Fremantle, A. J. (1963). The papal encyclicals in their historical context (5th (expanded ed.).). New American Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCatholic Church. Pope और Anne Jackson Fremantle. The Papal Encyclicals in Their Historical Context. 5th (expanded ed.). N.Y.: New American Library, 1963.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCatholic Church. Pope और Anne Jackson Fremantle. The Papal Encyclicals in Their Historical Context. 5th (expanded ed.). New American Library, 1963.
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