VIVI SYAFITRI; RENI ASTUTI; RIKAMUHAMAD FIRDAUS. PENERAPAN MODEL PEMBELAJARAN PROBLEM BASESD LEARNING DENGAN PENDEKATAN OPEN ENDED TERHADAP KEMAMPUAN BERPIKIR KRITIS SISWA PADA KELAS IX SMP. Journal of Innovation Research and Knowledge, [S. l.], v. 1, n. 8, p. 683–688, 2022. DOI: 10.53625/jirk.v1i8.1117. Disponível em: https://bajangjournal.com/index.php/JIRK/article/view/1117. Acesso em: 3 jul. 2025.