Morgan, G. A. (2020). IBM SPSS for introductory statistics: : use and interpretation. Routledge.
Lua i Stíl Chicago (17ú heag.)Morgan, George A. IBM SPSS for Introductory Statistics: : Use and Interpretation. Routledge, 2020.
Lua MLA (9ú heag.)Morgan, George A. IBM SPSS for Introductory Statistics: : Use and Interpretation. Routledge, 2020.
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