Cita APA (7th ed.)
O'Brien, D. M. (2003). Constitutional law and politics (5th ed.). Norton.
Cita Chicago (17th ed.)
O'Brien, David M. Constitutional Law and Politics. 5th ed. New York: Norton, 2003.
Cita MLA (9th ed.)
O'Brien, David M. Constitutional Law and Politics. 5th ed. Norton, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.