Nugroho W. Kesadaran Siswa terhadap Nilai-Nilai Karakter dalam Pembelajaran Virtual Trigonometri. J. Pend. Kar. [Internet]. 2021 Oct. 31 [cited 2025 Jul. 3];12(2):221-36. Available from: https://journal.uny.ac.id/index.php/jpka/article/view/39066