Leech, N. L., Barrett, K. C., & Morgan, G. A. (2011). IBM SPSS for intermediate statistics: Use and interpretation (4th ed.). Routledge.
Chicago Style (17th ed.) CitationLeech, Nancy L., Karen Caplovitz Barrett, and George A. Morgan. IBM SPSS for Intermediate Statistics: Use and Interpretation. 4th ed. New York: Routledge, 2011.
MLA (9th ed.) CitationLeech, Nancy L., et al. IBM SPSS for Intermediate Statistics: Use and Interpretation. 4th ed. Routledge, 2011.
Warning: These citations may not always be 100% accurate.