APA (7th ed.) Citation

Pius XI, P. (1926). St. Francis of Assisi: Encyclical Letter of His Holiness Pope Pius XI. Washington, D.C..

Chicago Style (17th ed.) Citation

Pius XI, Pope. St. Francis of Assisi: Encyclical Letter of His Holiness Pope Pius XI. Washington, D.C., 1926.

MLA (8th ed.) Citation

Pius XI, Pope. St. Francis of Assisi: Encyclical Letter of His Holiness Pope Pius XI. Washington, D.C., 1926.

Warning: These citations may not always be 100% accurate.