Cita APA (7a ed.)

O'Brien, D. M. (2005). Constitutional law and politics (6th ed.). W.W. Norton.

Cita Chicago Style (17a ed.)

O'Brien, David M. Constitutional Law and Politics. 6th ed. New York: W.W. Norton, 2005.

Cita MLA (9a ed.)

O'Brien, David M. Constitutional Law and Politics. 6th ed. W.W. Norton, 2005.