“The Sago Trade Dispute and Judicial Process in the Riau Lingga Kingdom: A Philological Analysis of Manuscript Letters from 1899-1900”. Journal of Philology and Historical Review 2, no. 2 (April 26, 2025): 110–128. Diakses Juli 13, 2026. https://journals.regalia-institute.com/index.php/JPHR/article/view/98.