Rizal Agus. “Development Model of the Batik Harmoni SMI Cluster in North Sumatera: Post-COVID-19 Strategies and Solutions”. Solo International Collaboration and Publication of Social Sciences and Humanities 4, no. 01 (January 11, 2026): 437–448. Accessed April 30, 2026. https://journal.walideminstitute.com/index.php/sicopus/article/view/498.