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Haeffel, Gerald J., Brandon E. Gibb, Gerald I. Metalsky, Lauren B. Alloy, Lyn Y. Abramson, Benjamin L. Hankin, Thomas E. Joiner, and Joel D. Swendsen. Measuring Cognitive Vulnerability to Depression: Development and Validation of the Cognitive Style Questionnaire. 2007.

Haeffel, Gerald J., et al. Measuring Cognitive Vulnerability to Depression: Development and Validation of the Cognitive Style Questionnaire. 2007.