Catholic church. Pope, 1958 (Joannes XXIII), & Gibbons, W. J. 1. (1962). Mater et magistra, encyclical letter; Christianity and social progress. Paulist Press.
Citace podle Chicago (17th ed.)Catholic church. Pope, 1958 (Joannes XXIII), a William Joseph 1912 Gibbons. Mater Et Magistra, Encyclical Letter; Christianity and Social Progress. Glen Rock, N. J: Paulist Press, 1962.
Citace podle MLA (9th ed.)Catholic church. Pope, 1958 (Joannes XXIII), a William Joseph 1912 Gibbons. Mater Et Magistra, Encyclical Letter; Christianity and Social Progress. Paulist Press, 1962.
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