Sugesti, Nunik, Sugirin Sugirin, Joko Priyana, and Ella Wulandari. 2023. “Needs Analysis on Developing Mobile-Phone Based Learning Materials to Accelerate Students’ Mastery of English Vocabulary”. Journal of Languages and Language Teaching 11 (4):748-61. https://doi.org/10.33394/jollt.v11i4.9127.