APA (7th ed.) Citation

Purcell, L. E. (2001). Vice presidents: A biographical dictionary (Updated ed.). Checkmark Books.

Chicago Style (17th ed.) Citation

Purcell, L. Edward. Vice Presidents: A Biographical Dictionary. Updated ed. New York: Checkmark Books, 2001.

MLA (9th ed.) Citation

Purcell, L. Edward. Vice Presidents: A Biographical Dictionary. Updated ed. Checkmark Books, 2001.

Warning: These citations may not always be 100% accurate.