Purcell, L. E. (2010). Vice presidents: A biographical dictionary (4th ed.). Facts On File.
Chicago Style (17th ed.) CitationPurcell, L. Edward. Vice Presidents: A Biographical Dictionary. 4th ed. New York: Facts On File, 2010.
MLA citiranjePurcell, L. Edward. Vice Presidents: A Biographical Dictionary. 4th ed. Facts On File, 2010.
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