Referensi:
- Fredricks, J. A., & Eccles, J. S. (2006). Is extracurricular participation associated with beneficial outcomes? Concurrent and longitudinal relations. Developmental Psychology, 42(4), 698–713.
- National Center for Education Statistics. (1995). Extracurricular Participation and Student Engagement. Retrieved from https://nces.ed.gov/pubs95/web/95741.asp
- Mahoney, J. L., Cairns, B. D., & Farmer, T. W. (2003). Promoting Interpersonal Competence and Educational Success Through Extracurricular Activity Participation. Journal of Educational Psychology, 95(2), 409–418.