APA (7th ed.) Citation

León XIII S. S. (1950). Rerum Novarum. Paulinas.

Chicago Style (17th ed.) Citation

León XIII S. S. Rerum Novarum. Paulinas, 1950.

MLA (9th ed.) Citation

León XIII S. S. Rerum Novarum. Paulinas, 1950.

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