APA (7th ed.) Citation

Davies, M. R., & Lewis, V. A. (1971). Models of political systems. Praeger Publishers.

Chicago Style (17th ed.) Citation

Davies, Morton R., and Vaughan A. Lewis. Models of Political Systems. New York: Praeger Publishers, 1971.

MLA (9th ed.) Citation

Davies, Morton R., and Vaughan A. Lewis. Models of Political Systems. Praeger Publishers, 1971.