“Kajian Produktivitas Perikanan Tuna Cakalang Tongkol Yang Tertangkap Dengan Kapal Pukat Cincin (purse Seine) 20 – 30 GT Di Pelabuhan Perikanan Samudera Bitung (Productivity of Tuna, Skipjack, Tuna Frigate Catched by Purse Seiner 20 - 30 GT Landed in Bitung Oceanic Fishing Port)”. 2018. Journal of Capture Fisheries Science and Technology 3 (1). https://doi.org/10.35800/jitpt.3.1.2018.18909.