Catholic Church. Pope & Fremantle, A. J. (1963). The papal encyclicals in their historical context (5th (expanded ed.).). New American Library.
Cita Chicago Style (17a ed.)Catholic Church. Pope y Anne Jackson Fremantle. The Papal Encyclicals in Their Historical Context. 5th (expanded ed.). N.Y.: New American Library, 1963.
Cita MLA (8a ed.)Catholic Church. Pope y Anne Jackson Fremantle. The Papal Encyclicals in Their Historical Context. 5th (expanded ed.). New American Library, 1963.
Precaución: Estas citas no son 100% exactas.