Gupitararas, Beatrix, and Wasitohadi Wasitohadi. “Pengaruh Model Number Head Together (NHT) Terhadap Hasil Belajar Matematika Siswa Kelas IV SD”. Jurnal Cendekia : Jurnal Pendidikan Matematika 4, no. 1 (May 5, 2020): 313-320. Accessed January 27, 2022. https://j-cup.org/index.php/cendekia/article/view/205.