Simanjuntak, D.H. et al. 2019. Sustainable Potential of Tuna Fishery Around the Waters of North Sulawesi Province Based on Data from the Bitung Ocean Fisheries Port (PPS). JURNAL PERIKANAN DAN KELAUTAN TROPIS. 10, 1 (Jul. 2019), 18–27. DOI:https://doi.org/10.35800/jpkt.10.1.2019.25071.