SUGIYANTO, SUGIYANTO, and RAMANG RAMANG. “MODEL PEMBELAJARAN PENERAPAN PROBLEM BASED LEARNING PADA ANAK USIA DINI”. Wiyatamandala, vol. 1, no. 1, Feb. 2021, pp. 86-95, https://openjournal.unpam.ac.id/index.php/wiyata/article/view/9623.