Purba JM. Konstruksi Normatif Model Martahi dalam Penyelesaian Wanprestasi Perjanjian pada Komunitas Mandailing : Normative Construction of the Martahi Model for Resolving Breach of Contract in Mandailing Communities . JSJ [Internet]. 2025 Jun. 5 [cited 2026 Oct. 25];2(1):13-2. Available from: https://journal.sinergilp.com/index.php/jsj/article/view/174