Kinnear, P. R., & Gray, C. D. (1999). SPSS for Windows made simple (3rd ed.). Psychology Press.
Lua i Stíl Chicago (17ú heag.)Kinnear, Paul R., agus Colin D. Gray. SPSS for Windows Made Simple. 3rd ed. Hove, East Sussex, UK: Psychology Press, 1999.
Lua MLA (9ú heag.)Kinnear, Paul R., agus Colin D. Gray. SPSS for Windows Made Simple. 3rd ed. Psychology Press, 1999.
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