siregar TJ. PEMBINAAN OLIMPIADE MATEMATIKA SISWA SMP SWASTA NAMIRA ISLAMIC SHOOLMEDAN. AJPKM [Internet]. 2017Feb.28 [cited 2024Nov.22];1(1):10-3. Available from: https://jurnal-lp2m.umnaw.ac.id/index.php/AJPKM/article/view/9