Gunarti, Triana Sri, et al. “Perancangan Aplikasi Harga Pokok Penjualan (HPP) Bahan Material Bangunan Menggunakan Meode Average”. Prosiding Seminar Nasional Informatika Bela Negara, vol. 4, Sept. 2024, pp. 1-5, https://santika.upnjatim.ac.id/submissions/index.php/santika/article/view/286.