Kelly, D. L. (1999). Measurement made accessible: A research approach using qualitative, quantitative and quality improvement methods. Sage.
Παραπομπή σε μορφή Chicago (17η εκδ.)Kelly, D. Lynn. Measurement Made Accessible: A Research Approach Using Qualitative, Quantitative and Quality Improvement Methods. Thousand Oaks: Sage, 1999.
Παραπομπή σε μορφή MLA (9th εκδ.)Kelly, D. Lynn. Measurement Made Accessible: A Research Approach Using Qualitative, Quantitative and Quality Improvement Methods. Sage, 1999.
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