Beden, S., and I. Zahid. “Pemetaan Struktur Peristiwa Kesopanan Berbahasa: Kombinasi Model Leech (1983) & Grice (1975): Mapping of Event Structures of Politeness in Language: Combination of Leech Model (1983) & Grice (1975)”. PENDETA, vol. 6, Dec. 2015, pp. 41-71, https://ejournal.upsi.edu.my/index.php/PENDETA/article/view/1158.