Cahyono B, Tsani D, Rahma A. PENGEMBANGAN BAHAN AJAR BUKU SAKU MATEMATIKA BERBASIS PENDIDIKAN KARAKTER MATERI TRIGONOMETRI. phen [Internet]. 2018 Dec. 30 [cited 2025 Jan. 6];8(2):185-99. Available from: https://journal.walisongo.ac.id/index.php/Phenomenon/article/view/2929