Παραπομπή σε μορφή APA (7η εκδ.)

Gilson, E. (1957). The church speaks to the modern world The social teachings of Leo XIII (4ª ed.). Image Books.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Gilson, Etienne. The Church Speaks to the Modern World The Social Teachings of Leo XIII. 4ª ed. Image Books, 1957.

Παραπομπή σε μορφή MLA (9th εκδ.)

Gilson, Etienne. The Church Speaks to the Modern World The Social Teachings of Leo XIII. 4ª ed. Image Books, 1957.