TY - BOOK AU - George, Darren AU - Mallery, Paul TI - IBM SPSS statistics 23 step by step: a simple guide and reference SN - 9780815366560 U1 - 005.55 G2931i14 PY - 2016/// CY - New York PB - Routledge KW - Social sciences KW - Statistical methods KW - Computer programs KW - SPSS (Computer file) ER -