MLA

Pius. Ad Salutem Humani. [encycliek 20 April 1930]. Fribourg: St-Paul, 1958.

APA

Pius, P. (1958). Ad salutem humani. [Encycliek 20 april 1930]. Fribourg: St-Paul.

Chicago

Pius Ad Salutem Humani. [encycliek 20 April 1930]. Fribourg: St-Paul, 1958.