Marceillina DN, Wiryokusumo I, Walujo DA. The Use of Probing Prompting Learning (PPL) and Inside Outside Circle (IOC) Model to Learning Outcome of Plane Figure Material. 101 [Internet]. 2019 Feb. 4 [cited 2024 May 19];5(1):9-14. Available from: http://scipg.com/index.php/101/article/view/41