Macridis, R. C., & Ward, R. E. (1972). Modern political systems. (3d ed.). Prentice-Hall.
芝加哥风格引文Macridis, Roy C., 与 Robert Edward Ward. Modern Political Systems. 3d ed. Englewood Cliffs, N.J.: Prentice-Hall, 1972.
MLA引文Macridis, Roy C., 与 Robert Edward Ward. Modern Political Systems. 3d ed. Prentice-Hall, 1972.
警告：这些引文格式不一定是100％准确.