“The Effectiveness of the Dual System Education Program at Vocational High Schools in Sidoarjo Regency: Efektivitas Program Pendidikan Sistem Ganda di Sekolah Menengah Kejuruan Kabupaten Sidoarjo” (2023) Indonesian Journal of Education Methods Development, 18(1), p. 10.21070/ijemd.v21i.692. doi:10.21070/ijemd.v21i.692.