Wijayanto, Bayu, Widia Sutriani, and Farisha Luthfi. “Kemampuan Berfikir Spasial Dalam Pembelajaran Abad 21”. Jurnal Samudra Geografi 3, no. 2 (June 30, 2020): 42-50. Accessed November 7, 2026. https://ejurnalunsam.id/index.php/jsg/article/view/2495.