Marsh, H. W. (1998). Age and gender effects in physical self-concepts for adolescent elite athletes and nonathletes: A multicohort-multioccasion design. Journal of sport and exercise psychology, 20(3), S. 237-259. http://www.naspspa.org/AcuCustom/Sitename/Documents/DocumentItem/1164.pdf

Marsh, Herbert W. "Age and Gender Effects in Physical Self-concepts for Adolescent Elite Athletes and Nonathletes: A Multicohort-multioccasion Design." Journal of Sport and Exercise Psychology 20, no. 3 (1998): S. 237-259.

Marsh, Herbert W. "Age and Gender Effects in Physical Self-concepts for Adolescent Elite Athletes and Nonathletes: A Multicohort-multioccasion Design." Journal of Sport and Exercise Psychology 20.3 (1998): S. 237-259.