Cita APA (7th ed.)
Ball, A. R. (1988). Modern politics and government. (4th ed.). Macmillan.
Cita Chicago (17th ed.)
Ball, Alan R. Modern Politics and Government. 4th ed. London: Macmillan, 1988.
Cita MLA (9th ed.)
Ball, Alan R. Modern Politics and Government. 4th ed. Macmillan, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.