Drummond, R. J. (1996). Appraisal procedures for counselors and helping professionals (3rd ed.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Drummond, Robert J. Appraisal Procedures for Counselors and Helping Professionals. 3rd ed. Englewood Cliffs, NJ: Prentice-Hall, 1996.
Lua MLA (9ú heag.)Drummond, Robert J. Appraisal Procedures for Counselors and Helping Professionals. 3rd ed. Prentice-Hall, 1996.
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