APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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