Gaya APA

XIII, L. ( tthn). Rerum novarum, (May 15, 1891), encyclical letter on the condition of the working classes, english transl. . Melbourne: The advocate press.

Gaya MLA

XIII, Leo. "Rerum novarum, (May 15, 1891), encyclical letter on the condition of the working classes, english transl. ". Melbourne: The advocate press, tthn. Buku.