PRASETYO, T.; PASARIBU, M.; GAOL, T.; TURNIP, T.; DAMANIK, J.; PANJAITAN, A.; PANE, M.; TOBING, N.; PARDOSI, L.; TIMOTHY, T.; SIHOMBING, Y. Development of DelTalk (an English learning application) using Agile Method. Jurnal Teknologi Informasi dan Pendidikan, v. 16, n. 1, p. 259-273, 25 out. 2023.