Adzkia, M. S., F. Rahman, M. P. Simatupang, N. Jalinus, and H. Effendi. “A Study of Teacher Professionalism in Online Learning Based on School Accreditation in Vocational High School”. Edumaspul: Jurnal Pendidikan, Vol. 6, no. 2, Oct. 2022, pp. 2727-33, doi:10.33487/edumaspul.v6i2.4879.