Muhtadi Irvan2 , Sunardi1, Elly Anjarsari1 , Hobri1 ,. “Spatial Intelligence on Solving Three Dimensional Geometry Object Through Project Based Learning”. International Journal of Social Sciences and Humanities Invention 4, no. 8 (August 20, 2017): 3817–3822. Accessed April 26, 2024. https://valleyinternational.net/index.php/theijsshi/article/view/876.