FendjalangS. N. M., RupiluK., SimangeS. M., and PaparangA. “Analysis of Lead (Pb) in the Coastal of Kupa Kupa Village, South Tobelo Dictrict, North Halmahera Regency: Analisis Kandungan Timbal (Pb) Pada Perairan Pantai Desa Kupa Kupa, Kecamatan Tobelo Selatan, Kabupaten Halmahera Utara”. Journal of Tropical Fisheries Management, Vol. 6, no. 2, Dec. 2022, pp. 126-33, doi:10.29244/jppt.v6i2.43894.