References:
Brown, B. B., & Lohr, M. J. (1987). Peer group affiliation and adolescent self-esteem: An integration of ego-identity and symbolic interaction theories. Journal of Personality and Social Psychology, 52 47-55. pdf
Brown, B. B., Lamborn, S. L., Mounts, N. S., & Steinberg, L. (1993). Parenting practices and peer group affiliation in adolescence. Child Development, 64, 467-482. pdf