Taufiq, Irham, and Denik Agustito. “Uji Kelayakan Modul Trigonometri Berbasis Ajaran Tamansiswa”. Mosharafa: Jurnal Pendidikan Matematika 10, no. 2 (May 30, 2021): 281–290. Accessed July 5, 2024. https://journal.institutpendidikan.ac.id/index.php/mosharafa/article/view/661.