APA (7th ed.) Citation

O'Connor, K., & Sabato, L. (2003). The essentials of American government: Continuity and change (2002 ed.). Longman.

Chicago Style (17th ed.) Citation

O'Connor, Karen, and Larry Sabato. The Essentials of American Government: Continuity and Change. 2002 ed. New York: Longman, 2003.

MLA (9th ed.) Citation

O'Connor, Karen, and Larry Sabato. The Essentials of American Government: Continuity and Change. 2002 ed. Longman, 2003.