1. Achenbach, T. (1991). Manual for the Child Behavior Checklist: 4-18 and 1991 Profile. University of Vermont, Department of Psychiatry, Burlington.
2. Barber, B. L., Eccles, J. S., and Stone, M. R. (2001). Whatever happened to the jock, the brain, and the Princess? Young adult pathways linked to adolescent activity involvement and social identity. J. Adolesc. Res. 16: 429–455.
3. Bartko, W. T., and Eccles, J. (1998, July). Adolescent extracurricular activity participation: Links to parents, families, peers and school. Paper presented at the biennial meeting of the International Society for the Study of Behavioral Development, Berne, Switzerland.
4. Bartko, W. T., and Eccles, J. (1999, April). Adolescent participation in structured and unstructured activities. Paper presented at the biennial meeting of the Society for Research in Child Development, Albuquerque, NM.
5. Bartko, W. T., Eccles, J., and Barber, B. (2000, April). Predicting adolescent participation in constructive activities from a motivational perspective. Paper presented at the British Psychological Society, Winchester, England.