MARKUS FA. Bimbingan Belajar Matematika Kepada Siswa Kelas IX Di SMP Kristen Payeti, Waingapu, Sumba Timur, NTT. jpb [Internet]. 2019May3 [cited 2024Apr.19];1(02):24-8. Available from: https://ejournal.upbatam.ac.id/index.php/jpkm/article/view/1203