Penetar, M. P. (1952). The social thought of the Catholic worker on the Negro. Catholic University of America Press.
Chicago-referens (17:e uppl.)Penetar, Michael P. The Social Thought of the Catholic Worker on the Negro. Washington: Catholic University of America Press, 1952.
MLA-referens (8:e uppl.)Penetar, Michael P. The Social Thought of the Catholic Worker on the Negro. Catholic University of America Press, 1952.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.