Macridis, R. C. (1978). Modern political systems: Europe. Prentice Hall.
Cita Chicago (17th ed.)Macridis, Roy C. Modern Political Systems: Europe. Englewood Cliffs, NJ: Prentice Hall, 1978.
Cita MLA (9th ed.)Macridis, Roy C. Modern Political Systems: Europe. Prentice Hall, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.