Ceplecha, C. (1963). Historical antecedents of Mater et Magistra. St. Procopius College.
Lua i Stíl Chicago (17ú heag.)Ceplecha, Christian. Historical Antecedents of Mater Et Magistra. Lisle, Ill.: St. Procopius College, 1963.
Lua MLA (8ú heag.)Ceplecha, Christian. Historical Antecedents of Mater Et Magistra. St. Procopius College, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.