ISHAK SAAT and AHMAD ZAINUDIN HUSIN, Institusi Raja: Pelbagai Kisah Kesultanan Alam Melayu. Penerbit UTHM, 2021. Accessed: Aug. 26, 2026. [Online]. Available: https://monograph.uthm.edu.my/index.php/penerbituthm/catalog/book/8