Ani Daeng Tahir, Evi Hulukati, and Ismail Djakaria, “DEVELOPMENT OF PROBLEM BASED LEARNING MODEL TO IMPROVE STUDENT’S CRITICAL THINKING SKILLS IN FLAT BUILDING MATERIALS IN CLASS IV DUMINANGA STATE SCHOOL”, Euro. J. Hum. Edu. Adv., vol. 3, no. 8, pp. 74-81, Aug. 2022.