Adzkia, M.S., Rahman, F., Simatupang, M.P., Jalinus, N. and Effendi, H. 2022. A Study of Teacher Professionalism in Online Learning Based on School Accreditation in Vocational High School. Edumaspul: Jurnal Pendidikan. 6, 2 (Oct. 2022), 2727-2733. DOI:https://doi.org/10.33487/edumaspul.v6i2.4879.