Aditiawarman, Mac, and Gusri Dozan. “Politeness in Utterance of Pasambahan Batagak Pangulu in Minangkabau Ethnic”. Jurnal Ilmiah Langue and Parole, vol. 7, no. 1, Dec. 2023, pp. 113-20, doi:10.36057/jilp.v7i1.634.