(2008). SPSS for intermediate statistics: Use and interpretation / Nancy L. Leech, Karen C. Barrett, George A. Morgan.
Tohutoru Kātū Chicago (17th ed.)SPSS for Intermediate Statistics: Use and Interpretation / Nancy L. Leech, Karen C. Barrett, George A. Morgan. 2008.
Tohutoro MLA (9th ed.)SPSS for Intermediate Statistics: Use and Interpretation / Nancy L. Leech, Karen C. Barrett, George A. Morgan. 2008.
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