Style de citation APA (7e éd.)

Paul VI, P. (1968). On the regulation of birth = Humanae vitae: Encyclical letter. Washington, D.C..

Style de citation Chicago (17e éd.)

Paul VI, Pope. On the Regulation of Birth = Humanae Vitae: Encyclical Letter. Washington, D.C., 1968.

Style de citation MLA (8e éd.)

Paul VI, Pope. On the Regulation of Birth = Humanae Vitae: Encyclical Letter. Washington, D.C., 1968.