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4nork Schalock, Robert L.Gaiak “...Human services Evaluation Methodology....”
Argitaratua 1995
Liburua -
5nork Hilton, Timothy, 1973-Gaiak Connect to electronic resource
Argitaratua 2020
Baliabide elektronikoa eBook -
6Argitaratua 2006Gaiak “...Human services Research Methodology....”
Liburua