Bibliografia principal:
Crozier, M., Huntignton, S. & Watanuki, J. (1975). The crisis of democracy: on the governability of democracies. New York: New York University Press.
Dahl, R. (1998). On Democracy. New Haven: Yale University Press.
Held, D. (2006). Models of democracy. Cambridge: Polity.
Diamond, L., & Morlino, L. (eds.) (2005). Assessing the quality of democracy. Baltimore: Johns Hopkins University Press.
Santos, J.A. (2020). Política e democracia na era digital. Lisboa: Parsifal.