APA
Symposium on the twentieth anniversary of the encyclical "Humanae Vitae", Smith R. E. & Pope John XXIII Medical-Moral Research and Education Center. (1991). Trust the truth. Braintree (Mass.): Pope John Center.
Chicago
Symposium on the twentieth anniversary of the encyclical "Humanae Vitae", Smith Russell Edward and Pope John XXIII Medical-Moral Research and Education Center. 1991. Trust the truth. Braintree (Mass.): Pope John Center.
Harvard
Symposium on the twentieth anniversary of the encyclical "Humanae Vitae", Smith R. E. and Pope John XXIII Medical-Moral Research and Education Center. (1991). Trust the truth. Braintree (Mass.): Pope John Center.
MLA
Symposium on the twentieth anniversary of the encyclical "Humanae Vitae", Smith Russell Edward and Pope John XXIII Medical-Moral Research and Education Center. Trust the truth. Braintree (Mass.): Pope John Center. 1991.