APA (7th ed.) Citation

Leo XIII. Papst. (1971). Encyclical letter Rerum novarum. [Typis Polyglottis Vaticanis].

Chicago Style (17th ed.) Citation

Leo XIII. Papst. Encyclical Letter Rerum Novarum. [Rome]: [Typis Polyglottis Vaticanis], 1971.

MLA (9th ed.) Citation

Leo XIII. Papst. Encyclical Letter Rerum Novarum. [Typis Polyglottis Vaticanis], 1971.

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