1. Amri, S.; Jauhari , A., & Elisah , T. Implementation of Character Education in Learning. Jakarta: PT Achievement Library, 2011.
2. Ashford University. Causes of social media addiction illness.Retrievedbyhttps://www.ashford.edu/online-degrees/studentlifestyle/causes-of-social-media-addiction-illness., 2017
3. Baccus, J.R., Baldwin, M.W., & Packer, D.JIncreasing Implicit Self- Esteem through Classical Conditioning. Psychological Science, 15 (7).2004..pp. 498–502.
4. Battistich, V. Character Education, Prevention, and Positive Youth Development. Journal of Research in Character Education, 6 (2), 2008, pp. 81-90.
5. Berkowitz, M.W. & Hoppe, M.A. Character Education and Gifted Children. High Ability Studies, 20 (2), 2009, 131-142