Br. Marpaung M, Siti Aisyah Hanim, Maulidawati. Illocutionary Acts of Speech in the Customary Marriage of the Toba Batak Community on the Use of Umpasa in Aek Song-Songan District, Asahan Regency. JPLED [Internet]. 2026 Apr. 8 [cited 2026 Apr. 30];6(1). Available from: https://digitalpress.gaes-edu.com/index.php/jpled/article/view/706