Ricky Louis Naibaho, Liston Rivaldo Sitorus, Jan Moris Saragih, Putri Kemala Dewi Lubis, Rossy Pratiwi Sihombing. Analisis Resiko Operasional UMKM Pecel Lele dan Ayam Lamongan Kang Adi William Iskandar Medan Tembung. optimal [Internet]. 2024 Jun. 30 [cited 2025 May 5];4(2):187-9. Available from: https://researchhub.id/index.php/optimal/article/view/3460