Wihardjo, R. Sihadi Darmo, Ayub Muktiono, Syahrul Ramadhan, Ibnu Salman, and Deni Hadiana. “The Analysis of Instrument Quality to Measure Graduate Students’ Higher Order Thinking Skill in Environmental Education Learning”. International Journal of Membrane Science and Technology 10, no. 3 (July 16, 2023): 277-283. Accessed July 22, 2024. https://cosmosscholars.com/phms/index.php/ijmst/article/view/1528.