Antonio, M., and N. Ayuyao. “A Parent- Implemented Phono Graphix ™ to Improve the Phonological Awareness of the Children at Risk- of Reading Difficulty”. ETERNAL (English, Teaching, Learning, and Research Journal), Vol. 9, no. 01, June 2023, pp. 67-84, doi:10.24252/Eternal.V91.2023.A5.