BURNS, R. B. (2008). Business research methods and statistics using SPSS. Sage.
Lua i Stíl Chicago (17ú heag.)BURNS, Robert B. Business Research Methods and Statistics Using SPSS. Sage, 2008.
Lua MLA (8ú heag.)BURNS, Robert B. Business Research Methods and Statistics Using SPSS. Sage, 2008.
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