Cita APA (7a ed.)

O'Brien, D. M. (1991). Constitutional law and politics. W.W. Norton.

Cita Chicago Style (17a ed.)

O'Brien, David M. Constitutional Law and Politics. New York: W.W. Norton, 1991.

Cita MLA (9a ed.)

O'Brien, David M. Constitutional Law and Politics. W.W. Norton, 1991.