Bibliografia principal:
Adcock, R., & Collier, D. (2001). Measurement Validity: A Shared Standard for Qualitative and Quantitative Research. The American Political Science Review, 95(3), 529–546.
Albarello, L. et al. (Eds.). (1997). Práticas e Métodos de Investigação em Ciências Sociais. Gradiva.
Anduiza, E. et al. (2009). Metodología de la ciencia política (2nd ed.). CIS.
Collier, D. et al. (2012). Putting typologies to work: Concept formation, measurement, and analytic rigor. Political Research Quarterly, 65(1), 217–232.
Della Porta, D., & Keating, M. (Eds.). (2008). Approaches and Methodologies in the Social Sciences. Cambridge University Press.
Kellstedt, P. M., & Whitten, G. D. (2018). The Fundamentals of Political Science Research (3rd ed.). Cambridge University Press.
Nina, S. R. et al. (Eds.). (2024). Manual de Métodos de Investigação em Ciência Política. Almedina.
Sartori, G. (1970). Concept misformation in comparative politics. The American Political Science Review, 64(4), 1033–1053.