Pett, M. A. (1997). Nonparametric statistics for health care research: Statistics for small samples and unusual distributions. Sage Publications.
Παραπομπή σε μορφή Chicago (17η εκδ.)Pett, Marjorie A. Nonparametric Statistics for Health Care Research: Statistics for Small Samples and Unusual Distributions. Thousand Oaks, Calif: Sage Publications, 1997.
Παραπομπή σε μορφή MLA (8th εκδ.)Pett, Marjorie A. Nonparametric Statistics for Health Care Research: Statistics for Small Samples and Unusual Distributions. Sage Publications, 1997.
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