Umila, B. V. Path analysis and the discrepancy evaluation model: An approach to program evaluation. Education quarterly..
Chicago-referens (17:e uppl.)Umila, Benwardo V. "Path Analysis and the Discrepancy Evaluation Model: An Approach to Program Evaluation." Education Quarterly. .
MLA-referens (9:e uppl.)Umila, Benwardo V. "Path Analysis and the Discrepancy Evaluation Model: An Approach to Program Evaluation." Education Quarterly., .
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.