Phillips, J. J. (1991). Handbook of training evaluation and measurement methods (2nd ed.). Gulf Pub. Co.
Lua i Stíl Chicago (17ú heag.)Phillips, Jack J. Handbook of Training Evaluation and Measurement Methods. 2nd ed. Houston: Gulf Pub. Co, 1991.
Lua MLA (8ú heag.)Phillips, Jack J. Handbook of Training Evaluation and Measurement Methods. 2nd ed. Gulf Pub. Co, 1991.
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