Beer, S. H., & Ulam, A. B. (1973). Patterns of government: The major political systems of Europe (3d ed. [rev. and reset].). Random House.
Čikaški stil citiranja (17. izdanje)Beer, Samuel Hutchison, i Adams Burno Ulam. Patterns of Government: The Major Political Systems of Europe. 3d ed. [rev. and reset]. New York: Random House, 1973.
MLA način citiranja (9. izdanje)Beer, Samuel Hutchison, i Adams Burno Ulam. Patterns of Government: The Major Political Systems of Europe. 3d ed. [rev. and reset]. Random House, 1973.
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