Clark, D. J. (1991). The Irish in Pennsylvania: A people share a commonwealth. University Park, Pa..
Cita Chicago Style (17a ed.)Clark, Dennis J. The Irish in Pennsylvania: A People Share a Commonwealth. University Park, Pa., 1991.
Cita MLA (8a ed.)Clark, Dennis J. The Irish in Pennsylvania: A People Share a Commonwealth. University Park, Pa., 1991.
Precaución: Estas citas no son 100% exactas.