1. Abdullah, H., Hamzah, A., Krauss, S. E., Mohd Yusuf, W., Dahalan, D. & Sulaiman, A. H. (2014). Kajian Pembangunan Kesejahteraan/Aset Belia Malaysia: Laporan Akhir (Study on Malaysian Youth Developmental Wellbeing and Assets: Final Report). Unpublished project report. Serdang, Malaysia: Institute for Social Science Studies, Universiti Putra Malaysia.
2. Ahmad, A. L., Rahim, S. A., Pawanteh, L., & Ahmad, F. (2012). The understanding of environmental citizenship among Malaysian youths: A study on perception and participation. Asian Social Science, 8(5), 85–92.
3. Anderson-Butcher, D., Newsome, W. S., & Ferrari, T. (2003). Participation in Boys and Girls Clubs and relationships to youth outcomes. Journal of Community Psychology, 31(1), 39–55.
4. Armsden, G. C., & Greenberg, M. T. (1987). The inventory of parent and peer attachment: Individual differences and their relationship to psychological well-being in adolescence. Journal of Youth and Adolescence, 16(5), 427–454.
5. Behling, O., & Law, K. S. (2000). Translating questionnaires and other research instruments: Problems and solutions. Thousand Oaks, CA: Sage.