Indayanti, Dwi Novi, and Lilik Sugiharti. “Investment Returns Analysis of Education in East Java”. Jurnal Ilmu Ekonomi Terapan 6, no. 2 (November 29, 2021): 235–254. Accessed August 3, 2024. https://e-journal.unair.ac.id/JIET/article/view/31143.