SYAHRI RAMADHAN; MELLY TRIA UTARI. A Discourse Analysis of Plantation Commodity Processing Advertisements in East Sumatran Newspapers (1870-1930). Yupa: Historical Studies Journal, [S. l.], v. 10, n. 1, p. 1–11, 2026. DOI: 10.30872/yupa.v10i1.5464. Disponível em: https://jurnal.fkip.unmul.ac.id/index.php/yupa/article/view/5464. Acesso em: 1 may. 2026.