How do I make bibliographic citations for this information? Answer The format of a reference or bibliographic citation of IBM SPSS Statistics is specific to a particular style manual, and guidance on the structure of such references or citations needs to come from your chosen manual. However, in many cases a formal reference or bibliographic citation is not necessary. Versions that were released after the acquisition would be given an origin or publisher of IBM Corp. Released
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Getting Started With SPSS 21 (part 1/3)