APA (7th ed.) Citation

Davies, M. R., & Lewis, V. A. (1971). Models of political systems. Pall Mall Press.

Chicago Style (17th ed.) Citation

Davies, Morton R., and Vaughan A. Lewis. Models of Political Systems. London: Pall Mall Press, 1971.

MLA (9th ed.) Citation

Davies, Morton R., and Vaughan A. Lewis. Models of Political Systems. Pall Mall Press, 1971.