APA (7th ed.) Citation

Pius XI, P. (1937). On the holy rosary: (ingravescentibus malis). America Press.

Chicago Style (17th ed.) Citation

Pius XI, Pope. On the Holy Rosary: (ingravescentibus Malis). New York: America Press, 1937.

MLA (8th ed.) Citation

Pius XI, Pope. On the Holy Rosary: (ingravescentibus Malis). America Press, 1937.