Ridwan A. A Vygotsky’s sociocultural approach to understanding pre-service English teachers for professional development (a study at STKIP PGRI Bangkalan). SELL [Internet]. 2019 Aug. 26 [cited 2025 May 6];4(2):138-45. Available from: http://publikasi.stkippgri-bkl.ac.id/index.php/SL/article/view/106