6Weiss, M. R. , &Smith, A. L. (1999). Quality of Youth Sport Friendships : Measurement Development and Validation [J]. Journal of Sport & Exercise Psychology,21:145 -166.
7Hyland, D. A. (1988). Competition and Friendship. In W. J.Morgan & K. VMeir( Eds. ) ,Philosophic Inquiry In Sport( pp. 231 -239 ). Illinois : Human Kinetics Publishers Inc.
8Maureen R. Weiss&Man L. Smith(2002). Friendship Quality in Youth Sport : Relationship to Age, Gender, and Motivation Variables[ J ]. Journal of Sport & Exercise Psychology,2:420 - 437.
9Parker,J. G. , & AshenS. R. ( 1993 ). Friendship and friendship quality in middle childhood:Links with peer group acceptance andfeelings of loneliness and social dissatisfaction [J]. Developmental Psycholog ,29:611 - 621.
10Furmam W. , &Buhrmester, D. ( 1985 ). Children's perception of the perseonal relationships in their social networks[J]. Child Development ,63 : 1016 - 1024.
