«IDENTIFYING WAYS TO INCREASE THE PRIVATE INCOME OF NORTH KHORASAN GENERAL DIRECTORATE OF EDUCATION». Isagoge - Journal of Humanities and Social Sciences 1, no. 4 (septiembre 28, 2021): 1–28. Accedido septiembre 6, 2026. https://www.telosjournals.com.br/ojs/index.php/isa/article/view/41.