Citazione Stile APA (7a Edizione)

Beer, S. H., & Ulam, A. B. (1958). Patterns of government: The major political systems of Europe. Random House.

Citazione stile Chigago Style (17a edizione)

Beer, Samuel Hutchison, e Adams Burno Ulam. Patterns of Government: The Major Political Systems of Europe. New York: Random House, 1958.

Citatione MLA (9a ed.)

Beer, Samuel Hutchison, e Adams Burno Ulam. Patterns of Government: The Major Political Systems of Europe. Random House, 1958.