Saputra, Wali. “The Provision of Pledge in the Sale and Purchase of Salam in the Perspective of Islamic Economics”. JIMU:Jurnal Ilmiah Multidisipliner 2, no. 02 (Juni 3, 2024): 325–331. Diakses Maret 12, 2025. https://ojs.smkmerahputih.com/index.php/jimu/article/view/367.