Simangunsong, Epi Hetnawati, Arsen Nahum Pasaribu, and Rony Arahta Sembiring. “Directive and Commissive Speech in Roald Dahl Novel: The Umbrella Man”. Jurnal Pendidikan dan Konseling (JPDK) 4, no. 5 (October 6, 2022): 4265–4276. Accessed November 22, 2024. http://journal.universitaspahlawan.ac.id/index.php/jpdk/article/view/7295.