Breadth and Intensity of Youth Activity Involvement as Contexts for Positive Development
Journal of Youth and Adolescence (2006) - Comment
doi: 10.1007/s10964-006-9037-6  issn: 0047-2891  issn: 1573-6601 

Linda Rose-Krasnor, Michael A. Busseri, Teena Willoughby, Heather Chalmers