Wulansari, R., and R. Nabawi. “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, Vol. 4, no. 4, Dec. 2021, pp. 111-7, doi:10.24036/jptk.v4i2.21123.