Aulia, K. ., A. Ntelu, and W. O. Irawati. “An Analysis of Students’ Language Politeness Toward Lecturers in Communication via WhatsApp: A Pragmatic Study”. Jurnal Pembelajaran Bahasa Dan Sastra, vol. 5, no. 5, Sept. 2026, pp. 4875-92, doi:10.55909/jpbs.v5i5.1841.