Nessa, Widya, Yusuf Hartono, and Cecil Hiltrimartin. “Pengembangan Buku Siswa Materi Jarak Pada Ruang Dimensi Tiga Berbasis Science, Technology, Engineering, and Mathematics (STEM) Problem-Based Learning Di Kelas X”. Jurnal Elemen 3, no. 1 (January 27, 2017): 1–14. Accessed December 22, 2024. https://e-journal.hamzanwadi.ac.id/index.php/jel/article/view/273.