“DISCIPLINE AND RESPONSIBILITIES CHARACTERS OF SENIOR HIGH SCHOOL(SMA) STUDENTS THROUGH PROBLEM BASED LEARNING ON TRANSPORT SYSTEM MATERIAL”. BIOTIK: Jurnal Ilmiah Biologi Teknologi Dan Kependidikan, vol. 10, no. 1, Apr. 2022, pp. 54-61, https://doi.org/10.22373/biotik.v10i1.11794.