HALIM, HARLIANA; YUSOFF, KAMARUZAMAN; AHMAD, SHAKILA; ABDUL KHIR, MOHD FAIZAL; ABDULLAH, ABDUL HAFIZ; BASIR, AMINUDDIN; SYED ABU BAKAR, SYARIFAH KHADIJAH. SUMBER-SUMBER KAJIAN TERHADAP KEWUJUDAN NEGARA ISLAM VOLGA BULGARIA 922 MASEHI. Human Sustainability Procedia, [S. l.], 2018. Disponível em: https://periodical.uthm.edu.my/index.php/hsp/article/view/1186. Acesso em: 15 aug. 2026.