SIMANGUNSONG, Epi Hetnawati; PASARIBU, Arsen Nahum; SEMBIRING, Rony Arahta. Directive and Commissive Speech in Roald Dahl Novel: The Umbrella Man. Jurnal Pendidikan dan Konseling (JPDK), [S. l.], v. 4, n. 5, p. 4265–4276, 2022. DOI: 10.31004/jpdk.v4i5.7295. Disponível em: https://journal.universitaspahlawan.ac.id/index.php/jpdk/article/view/7295. Acesso em: 5 dec. 2025.