Clark, D. J. (1991). The Irish in Pennsylvania: A people share a commonwealth. University Park, Pa..
Lua i Stíl Chicago (17ú heag.)Clark, Dennis J. The Irish in Pennsylvania: A People Share a Commonwealth. University Park, Pa., 1991.
Lua MLA (8ú heag.)Clark, Dennis J. The Irish in Pennsylvania: A People Share a Commonwealth. University Park, Pa., 1991.
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