Gaya APA

XII, P. (-1955). (Vegliare con sollecitudine), 29 Oct. 1951. address ... on marriage and the moral law. . London: Catolic Truth Society.

Gaya MLA

XII, Pius. "(Vegliare con sollecitudine), 29 Oct. 1951. address ... on marriage and the moral law. ". London: Catolic Truth Society, -1955. Buku.