Catholic Church. Pope & Fremantle, A. J. (1963). The papal encyclicals in their historical context (5th (expanded ed.).). New American Library.
Chicago Style (17th ed.) CitationCatholic Church. Pope and Anne Jackson Fremantle. The Papal Encyclicals in Their Historical Context. 5th (expanded ed.). N.Y.: New American Library, 1963.
MLA (8th ed.) CitationCatholic Church. Pope and Anne Jackson Fremantle. The Papal Encyclicals in Their Historical Context. 5th (expanded ed.). New American Library, 1963.
Warning: These citations may not always be 100% accurate.