1.
Simangunsong EH, Pasaribu AN, Sembiring RA. Directive and Commissive Speech in Roald Dahl Novel: The Umbrella Man. JPDK [Internet]. 2022Oct.6 [cited 2024Jul.1];4(5):4265-76. Available from: http://journal.universitaspahlawan.ac.id/index.php/jpdk/article/view/7295