Ad salutem humani. [Encycliek 20 april 1930].
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.