Sossriati M, Ristontowi R. Kemampuan Pemecahan Masalah Matematis Melalui Model Problem Based Instruction (PBI) di SMA. JPMR [Internet]. 2020 Jun. 11 [cited 2024 May 6];5(2):122-9. Available from: https://ejournal.unib.ac.id/jpmr/article/view/11417