Lumbantobing, H. (2018) “The Effect of Interactive Computer Program on Student Accomplishment in Teaching Trigonometry”, International Journal of Sciences: Basic and Applied Research (IJSBAR), 42(3), pp. 38–48. Available at: https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/9393 (Accessed: 18 May 2024).