Pardede, Uly, and Pastima Simanjuntak. “APLIKASI INFORMASI HARGA MATERIAL BANGUNAN DI TOKO SINAR JAYA DENGAN KODE QR BERBASIS ANDROID”. Computer and Science Industrial Engineering (COMASIE) 6, no. 3 (January 28, 2022): 81–87. Accessed July 3, 2024. https://ejournal.upbatam.ac.id/index.php/comasiejournal/article/view/5196.