Agustin, A. (2019). Reflective Journal as a Self-Directed and Sustainable Professional Development Tool for Pre-Service Teachers: A Case Study in English Language Education Study Program. Scholaria: Jurnal Pendidikan Dan Kebudayaan, 9(2), 103–110. https://doi.org/10.24246/j.js.2019.v9.i2.p103-110