Octaberlina, Like Raskova, and Afif Ikhwanul Muslimin. “Theme-Rheme Analysis and Thematic Progression in Joko Widodo’s Speech”. OKARA: Jurnal Bahasa Dan Sastra, vol. 14, no. 2, Nov. 2020, pp. 255-71, doi:10.19105/ojbs.v14i2.3900.