Sugiharto, S., Lubis, D. P., Rahmadi, M. T., Permana, S. and Putra, M. (2022) “Design of Geography Materials Have Substances of Indonesian Geopolitics as Systemic Program Strengthening National Character”, Randwick International of Social Science Journal, 3(4), pp. 801-815. doi: 10.47175/rissj.v3i4.521.