S. A. B. Lestari and E. Surya, “Analysis the Level Anxiety of Students in Dealing with National Exam on Mathematics Subjects”, IJSBAR, vol. 33, no. 2, pp. 99–107, May 2017, Accessed: Sep. 17, 2025. [Online]. Available: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/7345