1. Anderson RE, Crespo CJ, Bartlett SJ, Cheskin KM, Pratt M. JAMA 1998;279:938–42.
2. Anderson DR, Huston AC, Schmitt KL, Linebarger DL, Wright JC. Monogr Soc Res Child Dev. 2001;66:1–47.
3. Australian Bureau of Statistics. Children’s participation in leisure cultural and activities, Australia. 2004.
http://www.abs.gov.au/ausstats/abs@nsf/b06660592430724fca2568b5007b8619/0b14d8
. Retrieved 12/02/06.
4. Bandura A. Social foundations of thought and action: a social cognitive theory. New Jersey: Prentice-Hall; 1986.
5. Bar-On ME. Arch Dis Child. 2002;83:289–92.