Cronk C. Brian. (2020). How to Use SPSS: A Step-By-Step Guide to Analysis and Interpretation (11.). Routledge Taylor & Fancis Group.
Lua i Stíl Chicago (17ú heag.)Cronk C. Brian. How to Use SPSS: A Step-By-Step Guide to Analysis and Interpretation. 11. New York: Routledge Taylor & Fancis Group, 2020.
Lua MLA (9ú heag.)Cronk C. Brian. How to Use SPSS: A Step-By-Step Guide to Analysis and Interpretation. 11. Routledge Taylor & Fancis Group, 2020.
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