Ningsih, N.R. and Kamaludin, A. 2023. Development of Higher Order Thinking Skills-Based Assessment Instrument on Acid-Base Materials in High School. Jurnal Penelitian Pendidikan IPA. 9, 1 (Jan. 2023), 13–19. DOI:https://doi.org/10.29303/jppipa.v9i1.1457.