Maemunah, Siti, et al. “Shipping Safety in the Singapore Strait Tanjung Pinang, Riau Islands, Indonesia”. Jurnal Manajemen Transportasi & Logistik (JMTRANSLOG), vol. 8, no. 3, Nov. 2021, pp. 249-60, doi:10.54324/j.mtl.v8i3.650.