Leech, N. L., Barrett, K. C., & Morgan, G. A. (2015). IBM SPSS for intermediate statistics: Use and interpretation (Fifth edition.). Routledge, Taylor & Francis Group.
Chicago-viite (17. p.)Leech, Nancy L., Karen Caplovitz Barrett, ja George A. Morgan. IBM SPSS for Intermediate Statistics: Use and Interpretation. Fifth edition. New York, NY: Routledge, Taylor & Francis Group, 2015.
MLA-viite (9. p.)Leech, Nancy L., et al. IBM SPSS for Intermediate Statistics: Use and Interpretation. Fifth edition. Routledge, Taylor & Francis Group, 2015.
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