Sriyono, H. “Learning Discipline on Social Science Achievement at Junior High School in Bekasi, West Java Province, Indonesia”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 32, no. 3, Apr. 2017, pp. 159-63, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/7119.