Nasution, S., Thamrin, M., Rahardjo, S. and Purwa Saputra, D. (2024) “Guide Professionalism, Guide Services, Ship Security, and Shipping Safety for Smooth Ship Traffic at Indonesia’s Main Ports”, Dinasti International Journal of Education Management And Social Science, 6(2), pp. 772–784. doi: 10.38035/dijemss.v6i2.3630.