Listiyorini, Listiyorini, Leni Marlina, Muhamad Yusup, and Nor Farahwahidah Abdul Rahman. 2024. “The Preliminary Studies of Critical Thinking Skills on Subject of Matter and Their Changes on Middle Schooles”. Indonesian Journal of Education Research (IJoER) 5 (6), 260-69. https://doi.org/10.37251/ijoer.v5i6.1234.