Cita APA (7a ed.)

Macridis, R. C., & Ward, R. E. (1972). Modern political systems. (3d ed.). Prentice-Hall.

Cita Chicago Style (17a ed.)

Macridis, Roy C., y Robert Edward Ward. Modern Political Systems. 3d ed. Englewood Cliffs, N.J.: Prentice-Hall, 1972.

Cita MLA (9a ed.)

Macridis, Roy C., y Robert Edward Ward. Modern Political Systems. 3d ed. Prentice-Hall, 1972.