Showing 1 - 2 results of 2 for search 'DeVellis, Robert F.' Refine Results
  1. 1
    Scale development : theory and applications / Robert F. DeVellis.
    by DeVellis, Robert F.
    Published 2012
    Edition: 3rd ed.
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  2. 2
    Scale development : theory and applications.
    by DeVellis, Robert F.
    Published 1991
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