Widiyastuti, umi, and Dedi Purwana ES. “EVALUASI PELATIHAN (TRAINING) LEVEL II BERDASARKAN TEORI THE FOUR LEVELS KIRKPATRICK”. Jurnal Pendidikan Ekonomi Dan Bisnis (JPEB), vol. 3, no. 2, Oct. 2015, pp. 119-28, doi:10.21009/JPEB.003.2.1.