APA (7th ed.) Citation

Barry, N. P. (1989). An introduction to modern political theory (2. ed.). St. Martin's Press.

Chicago Style (17th ed.) Citation

Barry, Norman P. An Introduction to Modern Political Theory. 2. ed. New York: St. Martin's Press, 1989.

MLA (9th ed.) Citation

Barry, Norman P. An Introduction to Modern Political Theory. 2. ed. St. Martin's Press, 1989.