Sapoetra, J. 2021. Face Threatening Acts in Pre-Service Teachers and Students: A Case Study in EFL Classroom. Biormatika : Jurnal ilmiah fakultas keguruan dan ilmu pendidikan. 7, 2 (Sep. 2021), 199–205. DOI:https://doi.org/10.35569/biormatika.v7i2.1104.