Faturachman, D., & Sulaeman, K. A. (2021). Analysis of Sea Border Crossing Transportation Between Three Countries in Sumatera Island, Case Study: Tanjung Balai Karimun Port – Harbour Front Port, Singapore and Tanjung Balai Karimun Port – Kukup and Puteri Ports, Malaysia. International Journal of Advanced Engineering Research and Science, 8(5). https://journal-repository.com/index.php/ijaers/article/view/3577