Catholic Church. Pope (1963-1978 : Paul VI). (1968). Encyclical letter of his Holiness Pope Paul VI: On the regulation of birth : Humanae vitae, issued July 25, 1968. St. Paul Editions.
Čikaški stil citiranja (17. izdanje)Catholic Church. Pope (1963-1978 : Paul VI). Encyclical Letter of His Holiness Pope Paul VI: On the Regulation of Birth : Humanae Vitae, Issued July 25, 1968. Boston, Mass.: St. Paul Editions, 1968.
MLA način citiranja (8. izdanje)Catholic Church. Pope (1963-1978 : Paul VI). Encyclical Letter of His Holiness Pope Paul VI: On the Regulation of Birth : Humanae Vitae, Issued July 25, 1968. St. Paul Editions, 1968.
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