George, D., & Mallery, P. (2010). SPSS for Windows step by step: A simple guide and reference, 17.0 update (10th ed.). Pearson Education.
Chicago Style (17th ed.) CitationGeorge, Darren, and Paul Mallery. SPSS for Windows Step by Step: A Simple Guide and Reference, 17.0 Update. 10th ed. New Delhi: Pearson Education, 2010.
MLA (9th ed.) CitationGeorge, Darren, and Paul Mallery. SPSS for Windows Step by Step: A Simple Guide and Reference, 17.0 Update. 10th ed. Pearson Education, 2010.
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