Anipah, A., Fatah, A.H. and Syarpin, S. 2020. Analysis of Material Periodic System Material in Class X High School Chemistry Textbooks. Jurnal Ilmiah Kanderang Tingang. 11, 1 (Jun. 2020), 164-179. DOI:https://doi.org/10.37304/jikt.v11i1.84.