Cita APA (7th ed.)

Beer, S. H., Ulam, A. B., Spiro, H. J., Eckstein, H., & Wahl, N. (1962). Patterns of government: The major political systems of Europe (2a. ed.). Random House.

Cita Chicago (17th ed.)

Beer, Samuel H., Adam B. Ulam, Herbert J. Spiro, Harry Eckstein, i Nicholas Wahl. Patterns of Government: The Major Political Systems of Europe. 2a. ed. Nueva York: Random House, 1962.

Cita MLA (9th ed.)

Beer, Samuel H., et al. Patterns of Government: The Major Political Systems of Europe. 2a. ed. Random House, 1962.