O'Brien, D. J. (1992). Isaac Hecker: An American Catholic. Paulist Press.
Chicago Style (17th ed.) CitationO'Brien, David J. Isaac Hecker: An American Catholic. New York: Paulist Press, 1992.
MLA (8th ed.) CitationO'Brien, David J. Isaac Hecker: An American Catholic. Paulist Press, 1992.
Warning: These citations may not always be 100% accurate.