Strong, C. F. (1973). Modern political constitutions: An introduction to the comparative study of their history and existing forms (8th revised and enlarged, ed.). Sidgwick and Jackson.
Chicago-referens (17:e uppl.)Strong, C. Frederick. Modern Political Constitutions: An Introduction to the Comparative Study of Their History and Existing Forms. 8th revised and enlarged, ed. London: Sidgwick and Jackson, 1973.
MLA-referens (9:e uppl.)Strong, C. Frederick. Modern Political Constitutions: An Introduction to the Comparative Study of Their History and Existing Forms. 8th revised and enlarged, ed. Sidgwick and Jackson, 1973.
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