Dewi, P. et al. 2023. The Analysis of Chemistry Test Item Difficulty on XI MIPA Year-End Assessment at SMAN 8 Pontianak. Hydrogen: Jurnal Kependidikan Kimia. 11, 5 (Oct. 2023), 676–685. DOI:https://doi.org/10.33394/hjkk.v11i5.8881.