Supartono, Supartono, et al. “GEOSTRATEGY OF BITUNG PORT AREA ON INDONESIA’S MARITIME SECURITY PERSPECTIVE (STUDY ON THE INDO-PACIFIC REGION IN 2018-2019)”. Jurnal Pertahanan Dan Bela Negara, vol. 10, no. 3, Dec. 2020, pp. 287-06, doi:10.33172/jpbh.v10i3.1113.