APA (7th ed.) Citation

Lleó XIII, p. (1931). Useres Heiligsten Vaters Leo XIII . Herder.

Chicago Style (17th ed.) Citation

Lleó XIII, papa. Useres Heiligsten Vaters Leo XIII . Freiburg im Breisgau: Herder, 1931.

MLA (9th ed.) Citation

Lleó XIII, papa. Useres Heiligsten Vaters Leo XIII . Herder, 1931.

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