Treacy, G. C. (1947). A handbook of Catholic political philosophy: Based on the encyclicals of Leo XIII. Paulist Press.
Lua i Stíl Chicago (17ú heag.)Treacy, Gerald C. A Handbook of Catholic Political Philosophy: Based on the Encyclicals of Leo XIII. New York: Paulist Press, 1947.
Lua MLA (8ú heag.)Treacy, Gerald C. A Handbook of Catholic Political Philosophy: Based on the Encyclicals of Leo XIII. Paulist Press, 1947.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.