Rohilah, Rohilah, Erry Sunarya, and R Deni Muhammad Danial. “Analysis of Competitive Strategy Innovations: Case A Course and Training Institutes AHA Smart Matematika Jakarta”. International Journal of Economics (IJEC) 2, no. 2 (July 31, 2023): 231–243. Accessed November 26, 2024. https://ejournal.ipinternasional.com/index.php/ijec/article/view/479.