Sumarni T, Sudira P. The role of the heutagogy approach in advanced adult education as rebuilding the vocational self-concept in the industrial era 4.0 and society 5.0. jpv [Internet]. 2022 Jul. 18 [cited 2025 May 10];12(2):199-211. Available from: https://journal.uny.ac.id/index.php/jpv/article/view/49132