HALIM H, YUSOFF K, AHMAD S, ABDUL KHIR MF, ABDULLAH AH, BASIR A, et al. SUMBER-SUMBER KAJIAN TERHADAP KEWUJUDAN NEGARA ISLAM VOLGA BULGARIA 922 MASEHI. hsp [Internet]. 2018 May 31 [cited 2026 Apr. 8];. Available from: https://penerbit.uthm.edu.my/periodicals/index.php/hsp/article/view/1186