Fatimah, H.; Sumberartha, I. W. .; Setiawan, A. M. . The Validity and Readability Test for the Development of PBL-Based UKBM Teaching Materials on the Physics of the Human Circulatory System Is Oriented Towards Students’ Critical Thinking . jppipa, pendidikan ipa, fisika, biologi, kimia 2023, 9, 9-12.