Zahid, Indirawati. “Kesantunan Positif Dalam Bahasa Iklan Komersial: Positive Politeness in Commercial Advertising Language”. International Journal of Language Education and Applied Linguistics 10, no. 1 (May 29, 2020): 28–40. Accessed May 3, 2024. https://journal.ump.edu.my/ijleal/article/view/3492.