Umar, Umar, M Purwanto, and Moch. Al Firdaus. 2023. “RESEARCH AND DEVELOPMENT: AS THE PRIMARY ALTERNATIVE TO EDUCATIONAL RESEARCH DESIGN FRAMEWORKS”. JELL (Journal of English Language and Literature) STIBA-IEC Jakarta 8 (01), 73-82. https://doi.org/10.37110/jell.v8i01.172.