Simarmata EJ, Sinaga R. Lesson Study Training to Improve Teacher Professional Competence at SMP Negeri 10 Medan. JPPM [Internet]. 24 Agustus 2024 [dikutip 10 September 2025];1(01):28-32. Tersedia pada: https://ejournal.pustakakaryamandiri.com/ojs/index.php/jppm/article/view/10