Frankfort-Nachmias, C., & Nachmias, D. (1996). Research methods in the social sciences (5th ed.). London: Arnold.
Παραπομπή Chicago StyleFrankfort-Nachmias, Chava, and David Nachmias. Research Methods in the Social Sciences. 5th ed. London: Arnold, 1996.
Παραπομπή MLAFrankfort-Nachmias, Chava, and David Nachmias. Research Methods in the Social Sciences. 5th ed. London: Arnold, 1996.
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