Siska, and Samsul Maarif. “The Science, Technology, Engineering, Mathematics (STEM)-Based Problem-Based Learning (PBL) Learning Model on the Numeracy Skills”. MIMBAR PGSD Undiksha, vol. 11, no. 2, Aug. 2023, pp. 209-15, doi:10.23887/jjpgsd.v11i2.64836.