[1]
Al Jihad, N.G. et al. 2026. Design and Development of a Countdown Timer System in the Passenger Pickup and Drop-off Area Based on Ultrasonic Sensor. Jurnal Perintis: Pengembangan Riset Inovatif Teknik, Teknologi, dan Sains. 2, 2(Maret-April) (Apr. 2026), 83–91.