Widodo, Widodo, and Tarto Tarto. “Model Pembelajaran Numbered Heads Together Efektif Meningkatkan Hasil Belajar Muatan PPKn Di Kelas VI Sekolah Dasar”. Proceedings Series on Social Sciences & Humanities, vol. 3, June 2022, pp. 203-10, https://conferenceproceedings.ump.ac.id/pssh/article/view/379.