Ripley, R. B. (1988). Congress: Process and policy (4th ed.). W. W. Norton & Co.
Cita Chicago (17th ed.)Ripley, Randall B. Congress: Process and Policy. 4th ed. New York: W. W. Norton & Co, 1988.
Cita MLA (9th ed.)Ripley, Randall B. Congress: Process and Policy. 4th ed. W. W. Norton & Co, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.