Noor Muhammad, S. J. “Strategi Utusan Kerajaan Dalam Menjalin Hubungan Diplomatik Pada Zaman Kesultanan Melayu: Government Resolution Strategy in Establishing Diplomatic Relations During Malay Sultanate”. PENDETA, vol. 5, Nov. 2014, pp. 113-44, https://ojs.upsi.edu.my/index.php/PENDETA/article/view/1198.