Tetty, Morada, Avta Nia Lestari, Vauline Mikha Sherly Angel, Rahel Vincentia J Sianipar, Vera Ester Enjellina, Sriwi Anceli Naibaho, and May Devi Triana. “Implementation of Formal English Use in Direct Communication Contexts”. QISTINA: Jurnal Multidisiplin Indonesia 4, no. 2 (December 2, 2025): 1587–1599. Accessed June 24, 2026. https://rayyanjurnal.com/index.php/qistina/article/view/7368.