Rumalutur, Sonny. “DESAIN AND MANUFACTURE OF CHARGE PHONE USING SOLAR CELL FOR USE IN OUTDOOR PUBLIC FACILITIES”. Electro Luceat 8, no. 1 (July 30, 2022): 109-117. Accessed August 31, 2025. https://poltekstpaul.ac.id/jurnal/index.php/jelekn/article/view/466.