Sonntag, N. L. (1948). Censorship of special classes of books, Canons 1387-1391: A history and commentary. Catholic University of America Press.
Citace podle Chicago (17th ed.)Sonntag, Nathaniel Louis. Censorship of Special Classes of Books, Canons 1387-1391: A History and Commentary. Washington: Catholic University of America Press, 1948.
Citace podle MLA (8th ed.)Sonntag, Nathaniel Louis. Censorship of Special Classes of Books, Canons 1387-1391: A History and Commentary. Catholic University of America Press, 1948.
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