Karimah, Ummul, Heri Retnawati, Deni Hadiana, Pujiastuti Pujiastuti, and Eri Yusron. “The Characteristics of Chemistry Test Items on Nationally-Standardized School Examination in Yogyakarta City”. REID (Research and Evaluation in Education) 7, no. 1 (June 30, 2021): 1–12. Accessed May 15, 2025. https://jurnal.uny.ac.id/index.php/reid/article/view/31297.