George, D., & Mallery, P. (2003). SPSS for Windows step by step: A simple guide and reference 11.0 update (4th ed.). Boston: Allyn and Bacon.
Chicago Style CitationGeorge, Darren, and Paul Mallery. SPSS for Windows Step By Step: A Simple Guide and Reference 11.0 Update. 4th ed. Boston: Allyn and Bacon, 2003.
MLA CitationGeorge, Darren, and Paul Mallery. SPSS for Windows Step By Step: A Simple Guide and Reference 11.0 Update. 4th ed. Boston: Allyn and Bacon, 2003.
Warning: These citations may not always be 100% accurate.