Cita APA (7th ed.)

Catholic Church. Pope,1963-1978 (Paulus VI). (1968). Encyclical letter, On the regulation of birth. A.C.T.S..

Cita Chicago (17th ed.)

Catholic Church. Pope,1963-1978 (Paulus VI). Encyclical Letter, On the Regulation of Birth. Melbourne: A.C.T.S., 1968.

Cita MLA (8th ed.)

Catholic Church. Pope,1963-1978 (Paulus VI). Encyclical Letter, On the Regulation of Birth. A.C.T.S., 1968.