D. Hardiyanto, M. . Pasaribu, and A. Afadil, “Development of HOTS LKPD Using Problem-Based Learning Models to Improve Students’ Critical Thinking Abilities and Science Processing Skills in Junior High School”, Int. J. Educ. Hum. Soc. Stud., vol. 2, no. 1, pp. 44–51, Mar. 2025, doi: 10.63895/j30321271.2025.v2.i1.pp44-51.