O'Brien, D. J. (1992). Isaac Hecker: An American Catholic. Paulist Press.
Chicagoスタイル(17版)引用形式O'Brien, David J. Isaac Hecker: An American Catholic. New York: Paulist Press, 1992.
MLA(8版)引用形式O'Brien, David J. Isaac Hecker: An American Catholic. Paulist Press, 1992.
警告: この引用は必ずしも正確ではありません.