Kusuma Jaya, I Putu, 		Widagda, I Gusti Agung, DAN 		Antha Kasmawan, I Gde.
"Rancang The Prototype of Water Level Detection System Using HC-SR04 Sensor and GSM SIM800L Module Based on ATMega 328 Microcontroller" <em>BULETIN FISIKA</em> [Online], Volume 24 Nomor 1 (30 October 2021)