Ismawan J. “COLOR PEN” (ALAT BANTU BACA WARNA BAGI PENYANDANG TUNANETRA). JE [Internet]. 2019 Oct. 15 [cited 2024 Aug. 21];1(1):69-83. Available from: https://ejournal.akprind.ac.id/index.php/elektrikal/article/view/2584