Qadrianti, L., and N. Muhlis. “Imperative Politeness in Learning Interaction at Islamic Institute of Muhammadiyah Sinjai (a Study of Pragmatic Imperative)”. ELS Journal on Interdisciplinary Studies in Humanities, vol. 2, no. 3, Sept. 2019, pp. 331-8, doi:10.34050/els-jish.v2i3.5652.