Cita APA (7th ed.)

Beer, S. H., & Ulam, A. B. (1962). Patterns of government: The major political systems of Europe (2d ed., rev. and enl.). Random House.

Cita Chicago (17th ed.)

Beer, Samuel Hutchison, i Adams Burno Ulam. Patterns of Government: The Major Political Systems of Europe. 2d ed., rev. and enl. New York: Random House, 1962.

Cita MLA (9th ed.)

Beer, Samuel Hutchison, i Adams Burno Ulam. Patterns of Government: The Major Political Systems of Europe. 2d ed., rev. and enl. Random House, 1962.