Fathira, Vina, and Silvia Utami. “Implementing an Android-Based Learning Media Application to Improve Learners’ Ability in Pronouncing Ending-S”. J-SHMIC : Journal of English for Academic, vol. 6, no. 2, Aug. 2019, pp. 14-26, doi:10.25299/jshmic.2019.vol6(2).3555.