Mu’afah, Azizatum, Sintha Tresnadewi, and Nova Ariani. 2021. “Developing a Smartphone Application Prototype As Digital Supplementary Reading Materials for the Tenth Graders for Vocational High School”. JoLLA: Journal of Language, Literature, and Arts 1 (2):206-20. https://doi.org/10.17977/um064v1i22021p206-220.