CHEN, Wen Haw. Development of Teaching and Learning Materials for Geometry through Problem-based Learning Model. Sains Humanika, [S. l.], v. 63, n. 2, 2013. DOI: 10.11113/sh.v63n2.161. Disponível em: https://sainshumanika.utm.my/index.php/sainshumanika/article/view/161. Acesso em: 20 dec. 2024.