Curtis, M., & Blondel, J. (1993). Introduction to comparative government (3rd ed.). HarperCollins College Publishers.

Curtis, Michael, and Jean Blondel. Introduction to Comparative Government. 3rd ed. New York, N.Y.: HarperCollins College Publishers, 1993.

Curtis, Michael, and Jean Blondel. Introduction to Comparative Government. 3rd ed. HarperCollins College Publishers, 1993.