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- Encyclopedia of Psychology, 2000 [Ref. BF31 .E52]
- Encyclopedia of Psychology and Religion, 2010 (BL53 .E43)
- Gale Encyclopedia of Mental Health, 2008 [Ref. RC437 G36]
- Mental Measurements Yearbooks [Ref. BF431 .M46]
- Elsevier's Dictionary of Psychological Theories, 2006.
Key database: PsycInfo (search under "P")
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