O'Connor, K. O., & Sabato, L. (2005). The essentials of American government: Continuity and change (2004 election update edition.). Longman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रO'Connor, Karen O., और Larry Sabato. The Essentials of American Government: Continuity and Change. 2004 election update edition. New York: Longman, 2005.
एमएलए (9वां संस्करण) प्रशस्ति पत्रO'Connor, Karen O., और Larry Sabato. The Essentials of American Government: Continuity and Change. 2004 election update edition. Longman, 2005.
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