Djatmiko, Istanto Wahyu. “A STUDY ON THE EMPOWERING TEACHERS’ PROFESSIONAL DEVELOPMENT AND QUALITY ASSURANCE TO INCREASE TEACHERS’ EFFECTIVENESS IN VOCATIONAL SECONDARY SCHOOLS”. Jurnal Pendidikan Teknologi Dan Kejuruan, vol. 23, no. 2, Oct. 2016, pp. 144-51, doi:10.21831/jptk.v23i2.13182.