Dwi Anisah Lailatul Hasanah M, Sadan Rizqi, Muhammad Ishaidir, Michella Ayu Pramesti, Oktyasti Ganda, Darin Alya Khairunnisa, Iskandarsyah, “Identification of Carbonate Freshwater in Perak Island, Kepulauan Seribu Using Ground Penetrating Radar Method”, J Arch.Egyptol, vol. 17, no. 9, pp. 979 - 985, Nov. 2020.