Hoyle, R. H., Harris, M. J., & Judd, C. M. (2002). Research methods in social relations (7th ed.). Wadsworth.
Chicago Style aipamenaHoyle, Rick H., Monica J. Harris, and Charles M. Judd. Research Methods in Social Relations. 7th ed. Australia: Wadsworth, 2002.
MLA aipamenaHoyle, Rick H., et al. Research Methods in Social Relations. 7th ed. Wadsworth, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.