Szarnicki, H. A. (1975). Michael O'Connor, first Catholic bishop of Pittsburgh, 1843-1860: A story of the Catholic pioneers of Pittsburgh and western Pennsylvania (1st. ed.). Wolfson Pub. Co..
Chicago-viite (17. p.)Szarnicki, Henry A. Michael O'Connor, First Catholic Bishop of Pittsburgh, 1843-1860: A Story of the Catholic Pioneers of Pittsburgh and Western Pennsylvania. 1st. ed. Pittsburgh: Wolfson Pub. Co., 1975.
MLA-viite (8. p.)Szarnicki, Henry A. Michael O'Connor, First Catholic Bishop of Pittsburgh, 1843-1860: A Story of the Catholic Pioneers of Pittsburgh and Western Pennsylvania. 1st. ed. Wolfson Pub. Co., 1975.
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