King, G., Keohane, R. O., & Verba, S. Designing Social Inquiry: Scientific inference in qualitative research. Princeton University Press.
Citazione stile Chigago Style (17a edizione)King, Gary, Robert O. Keohane, e Sidney Verba. Designing Social Inquiry: Scientific Inference in Qualitative Research. New Jersey: Princeton University Press.
Citatione MLA (9a ed.)King, Gary, et al. Designing Social Inquiry: Scientific Inference in Qualitative Research. Princeton University Press.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.