Holden, V. F. (1974). The early years of Isaac Thomas Hecker (1819-1844) (1st AMS ed.). AMS Press.
Lua i Stíl Chicago (17ú heag.)Holden, Vincent F. The Early Years of Isaac Thomas Hecker (1819-1844). 1st AMS ed. New York: AMS Press, 1974.
Lua MLA (8ú heag.)Holden, Vincent F. The Early Years of Isaac Thomas Hecker (1819-1844). 1st AMS ed. AMS Press, 1974.
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