Mardika, M Gilang Indra, et al. “Study of Jetty Planning As Coastal Protection Structure to Address Estuary Sedimentation: Case Study of Lubuk Tukko Beach, North Sumatra Province”. BANDAR: JOURNAL OF CIVIL ENGINEERING, vol. 7, no. 2, Nov. 2025, pp. 102-10, doi:10.31605/bjce.v7i2.4703.