Portier, W. L. (1985). Isaac Hecker and the First Vatican Council. E. Mellen Press.
Lua i Stíl Chicago (17ú heag.)Portier, William L. Isaac Hecker and the First Vatican Council. Lewiston, N.Y.: E. Mellen Press, 1985.
Lua MLA (8ú heag.)Portier, William L. Isaac Hecker and the First Vatican Council. E. Mellen Press, 1985.
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