“An Analysis of Sentence Errors in Negotiation Texts Written by Phase E10 Students at SMAN 5 Padang”. TOFEDU: The Future of Education Journal 5, no. 3 (October 19, 2026): 5604–5610. Accessed October 23, 2026. https://journal.tofedu.or.id/index.php/journal/article/view/2345.