Laia, T. ., and J. W. . Parningotan Saragih. “Proses Pergantian Crew Kapal Asing Mv. Elisabeth Oldendroff Oleh PT. Sea Asih Lines (SAL) Cabang Belawan”. Jurnal Penelitian Samudra, vol. 1, no. 1, Apr. 2023, pp. 24-30, https://samudrajurnal.id/index.php/samudra/article/view/4.