Παραπομπή APA

Macridis. Roy C. (1983). Modern political systems: Europe. Prentice hall.

Παραπομπή Chicago Style

Macridis. Roy C. Modern Political Systems: Europe. : Prentice hall, 1983.

Παραπομπή MLA

Macridis. Roy C. Modern Political Systems: Europe. Prentice hall, 1983.