Ridwan, A. (2019). A Vygotsky’s sociocultural approach to understanding pre-service English teachers for professional development (a study at STKIP PGRI Bangkalan). SELL (Scope of English Language Teaching, Linguistics, and Literature) Journal, 4(2), 138–145. Retrieved from http://publikasi.stkippgri-bkl.ac.id/index.php/SL/article/view/106