Wulansari, R. E., & Nabawi, R. A. (2021). Efforts to improve problem solving skills and critical thinking skills through problem-based integrated Computer Assisted Instruction (CAI) in Vocational Education. Jurnal Pendidikan Teknologi Kejuruan, 4(4), 111–117. https://doi.org/10.24036/jptk.v4i2.21123