Gultom, Muhammad Reza Firdaus, and Posma Lumbanraja. “ANALISIS STRATEGI PADA UMKM SEPATU KOTAMA DENGAN PORTER’S FIVE FORCES”. Journal Business Administration: Entrepreneurship and Creative Industry 1, no. 1 (January 30, 2022): 1-10. Accessed December 4, 2024. https://talenta.usu.ac.id/jba/article/view/9040.