Khadijah, Khadijah, Indah Suciati, Khaerani Khaerani, Abdul Manaf, and Sutamrin Sutamrin. “Schools’ Character Education Values and students’ Mathematics Learning Achievement: A Meta-Analysis”. Jurnal Cakrawala Pendidikan 40, no. 3 (October 19, 2021): 670–683. Accessed May 12, 2025. https://journal.uny.ac.id/index.php/cp/article/view/39924.