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2
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Summated rating scale construction : an introduction / Paul E. Spector.
- 300.151 S7418
- Spector, Paul E.,
- Sage Publications,
- [1992] ©1992
- California :
-
Research designs / Paul E. Spector.
- 300.72 S7418r
- Spector, Paul E.,
- Sage Publications,
- [1981] ©1981
- Newbury Park :