Watt, L. (1950). Pope Pius XI and social reconstruction. An introduction to the Encyclical Quadragesimo Anno. Oxford.
Chicago-referens (17:e uppl.)Watt, Lewis. Pope Pius XI and Social Reconstruction. An Introduction to the Encyclical Quadragesimo Anno. Oxford, 1950.
MLA-referens (8:e uppl.)Watt, Lewis. Pope Pius XI and Social Reconstruction. An Introduction to the Encyclical Quadragesimo Anno. Oxford, 1950.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.