1. Aiken, I. S., & West, S. G. 1991. Multiple regression: testing and interpreting interactions. Newbury Park, CA: Sage.
2. Barroso Beltrao, E., Costa Gissoni, V., & Feijo, O. G. 2002. How will professionally successful women from Rio de Janeiro perceive their own body. Fitness & Performance, 1, 21-27.
3. Brodkin, P., &Weiss, M. R. 1990. Developmental differences in motivation for participating in competitive swimming. Journal of Sport and Exercise Psychology, 12, 248-263.
4. Buonamano, R., Cei, A., & Mussino, A. 1995. Participation motivation in Italian youth sport. Sport Psychology, 9, 265-281.
5. Cronbach, L. J. 1951. Coefficient alpha and the internal structure of tests. Psychometrica, 16, 297-333.