Crismono, Prima Cristi. “Pengaruh Outdoor Learning Terhadap Kemampuan Berpikir Kritis Matematis Siswa”. Jurnal Pendidikan Matematika dan Sains 5, no. 2 (December 4, 2017): 106–113. Accessed May 6, 2025. https://journal.uny.ac.id/index.php/jpms/article/view/15482.