Dewi NLS, Suweken G, Sudiarta IGP. Development of mathematics learning tools through scientific approach with problem based learning (PBL) settings to improve motivation and learning achievement. JPP [Internet]. 2019 Apr. 5 [cited 2024 May 8];52(1):33-9. Available from: https://ejournal.undiksha.ac.id/index.php/JPP/article/view/17247