Yegidis, B. L., Weinbach, R. W., & Myers, L. L. (2012). Research methods for social workers (7th ed.). Pearson/Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)Yegidis, Bonnie L., Robert W. Weinbach, agus Laura L. Myers. Research Methods for Social Workers. 7th ed. Boston: Pearson/Allyn and Bacon, 2012.
Lua MLA (9ú heag.)Yegidis, Bonnie L., et al. Research Methods for Social Workers. 7th ed. Pearson/Allyn and Bacon, 2012.
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