Παραπομπή σε μορφή APA (7η εκδ.)

Umila, B. V. Path analysis and the discrepancy evaluation model: An approach to program evaluation. Education quarterly..

Παραπομπή σε μορφή Chicago (17η εκδ.)

Umila, Benwardo V. "Path Analysis and the Discrepancy Evaluation Model: An Approach to Program Evaluation." Education Quarterly. .

Παραπομπή σε μορφή MLA (9th εκδ.)

Umila, Benwardo V. "Path Analysis and the Discrepancy Evaluation Model: An Approach to Program Evaluation." Education Quarterly., .