Situmorang, Rina Oktaviani. “Pengaruh Pembelajaran Berbasis Proyek Terhadap Kemampuan Berpikir Kreativ Matematis Siswa Kelas VIII ”. Journal of Education Research 5, no. 4 (September 5, 2024): 4335–4341. Accessed July 31, 2025. https://jer.or.id/index.php/jer/article/view/1621.