Oktoviana Ustien, Dewi, and Umar Marhum. “PERSPEKTIF HUKUM TERHADAP SUATU PERJANJIAN”. Lakidende Law Review 1, no. 2 (August 25, 2022): 85–92. Accessed April 5, 2025. https://delarev.com/index.php/go/article/view/11.