APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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