Halim, Harliana, Kamaruzaman Yusoff, Shakila Ahmad, Mohd Faizal Abdul Khir, Abdul Hafiz Abdullah, Shahidah Hamzah, Hani Suraya Aziz, Shamsaadal Sholeh Saad, and Mansoureh Ebrahimi. “Analysis on Social Change Among Bulghar Society Based on Risalah Ibn Fadlan 922 AD”. International Journal of Engineering & Technology 7, no. 4.9 (October 2, 2018): 190–193. Accessed May 2, 2024. https://sciencepubco.com/index.php/ijet/article/view/20671.