Batubara N, Emiliannur E. Analysis of Students’ Critical Thinking Ability Instruments in Thermodynamics Material Phase F SMA/MA Reviewed from Validity, Reliability, Level of Difficulty and Differentiation. Department of Physics Universitas Negeri Padang [Internet]. 2025 Dec. 17 [cited 2026 Jun. 14];3(4). Available from: https://ple.ppj.unp.ac.id/index.php/ple/article/view/297