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Cita Chicago (17th ed.)SPSS for Intermediate Statistics: Use and Interpretation / Nancy L. Leech, Karen C. Barrett, George A. Morgan. 2008.
Cita MLA (9th ed.)SPSS for Intermediate Statistics: Use and Interpretation / Nancy L. Leech, Karen C. Barrett, George A. Morgan. 2008.
Atenció: Aquestes cites poden no estar 100% correctes.