APA (7th ed.) Citation

Leo XIII, P. (1903). The truth. Rights of capital and labor. Famous letter of Pope Leo XIII. Chicago.

Chicago Style (17th ed.) Citation

Leo XIII, Pope. The Truth. Rights of Capital and Labor. Famous Letter of Pope Leo XIII. Chicago, 1903.

MLA (8th ed.) Citation

Leo XIII, Pope. The Truth. Rights of Capital and Labor. Famous Letter of Pope Leo XIII. Chicago, 1903.

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