Gunawan, I., Pratiwi, F.D., Setya, N.W.N., Putri, A.F., Sukawati, N.N., Santoso, F.B., Rofiah, S.K., & Hidayati, N. (2020). Measurement of vocational high school teachers professionalism. Advances in Social Science, Education and Humanities Research, 508, 67-72.