D. R. Firmansyah, N. Nahadi, and H. Firman, “Development of Performance Assessment Instruments to Measure Students’ Scientific Thinking Skill in the Quantitative Analysis of Acetic Acid Levels”, JES, vol. 4, no. 3, pp. 459–468, Jul. 2020, doi: 10.31258/jes.4.3.p.459-468.