Mohammad Iskandar, and Mohammad Iskandar. “The Alert Period in the Residency of Bogor-Indonesia (Bogor Around the Proclamation for Independent)”. Global Journal of Human-Social Science, vol. 15, no. D1, Jan. 2015, pp. 19-27, https://socialscienceresearch.org/index.php/GJHSS/article/view/1399.