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Kaynaklar
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K1. SPSS Institute Inc., 2009. SPSS Base 15.0 User?s Guide, 388 p.
K2. Einspruch, E., 2005. An Introductory guide to SPSS for Windows, SAGE publications, 616 p.
K3. Morgan, G. A., Leech, N. L., Gloeckner, G. W. and Barrett, K. C. (2004). SPSS for introductory statistics, Lawrence Erlbaum Publishers, 223 p.
K4. Coakes, S. J. (2005). SPSS: Analysis without anguish, version 12.0 for Windows. Sydney: John Wiley Sons.
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