Iqbal, M., and M. Yusuf. “DESIGN OF EQUIPMENT OF SIMPLE ELECTRONIC APPLICATION FOR TUNANETRA USING TEXT CONVERSION TO SOUND WITH ISD 2590”. Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering), Vol. 3, no. 2, Oct. 2016, pp. 10-16, doi:10.33019/ecotipe.v3i2.20.