Cita APA (7a ed.)

Davies, M., & Lewis, M. (1971). Models of political systems. Vikas Publications.

Cita Chicago Style (17a ed.)

Davies, M., y M. Lewis. Models of Political Systems. Delhi: Vikas Publications, 1971.

Cita MLA (9a ed.)

Davies, M., y M. Lewis. Models of Political Systems. Vikas Publications, 1971.