Groth, A. J., Lieber, R. J., & Lieber, N. I. (1976). Contemporary politics: Europe. Winthrop Publishers.
Cita Chicago Style (17a ed.)Groth, Alexander J., Robert J. Lieber, y Nancy I. Lieber. Contemporary Politics: Europe. Cambridge, Mass.: Winthrop Publishers, 1976.
Cita MLA (8a ed.)Groth, Alexander J., et al. Contemporary Politics: Europe. Winthrop Publishers, 1976.
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