Handriani, Rini, Suriana Suriana, and Widia Wardani. “Analysis of the Factors Influencing the Decreasing Profit in Ayam Penyet Restaurant, Surabaya, Medan”. ProBisnis : Jurnal Manajemen 14, no. 2 (April 25, 2023): 179–187. Accessed November 16, 2024. http://ejournal.joninstitute.org/index.php/ProBisnis/article/view/116.