Prasetya, Didik Dwi, Aryo Pinandito, Yusuke Hayashi, and Tsukasa Hirashima. 2022. “Analysis of Quality of Knowledge Structure and students’ Perceptions in Extension Concept Mapping”. Research and Practice in Technology Enhanced Learning 17 (May). https://rptel.apsce.net/index.php/RPTEL/article/view/2022-17014.