All 1 DeVellis, Robert F. (The University of North C... Book
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![Cover for DeVellis, Robert F. (The University of North Carolina at Chapel Hill, USA) · Scale Development: Theory and Applications (Paperback Book) [5 Revised edition] (2022)](https://imusic.b-cdn.net/images/item/original/340/9781544379340.jpg?devellis-robert-f-the-university-of-north-carolina-at-chapel-hill-usa-2022-scale-development-theory-and-applications-paperback-book&class=scaled&v=1629272155)