Beer, S. H. (1973). Patterns of government: The major political systems of Europe (3rd ed.). Random House.
Styl ChicagoBeer, Samuel H. Patterns of Government: The Major Political Systems of Europe. 3rd ed. New York: Random House, 1973.
Citace podle MLABeer, Samuel H. Patterns of Government: The Major Political Systems of Europe. 3rd ed. Random House, 1973.
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