Judd, C. M., Smith, E. R., & Kidder, L. H. (1991). Research methods in social relations (6th ed.). Holt, Rinehart and Winston.
Cita Chicago Style (17a ed.)Judd, Charles M., Eliot R. Smith, y Louise H. Kidder. Research Methods in Social Relations. 6th ed. Fort Worth, Texas [etc.]: Holt, Rinehart and Winston, 1991.
Cita MLA (9a ed.)Judd, Charles M., et al. Research Methods in Social Relations. 6th ed. Holt, Rinehart and Winston, 1991.
Precaución: Estas citas no son 100% exactas.