HARRA, K.; RUOHOTIE, P. Tutkimus ja ammatillinen toinen aste. Journal of Professional and Vocational Education, [S. l.], v. 8, n. 4, p. 4–5, 2006. Disponível em: https://journal.fi/akakk/article/view/114974. Acesso em: 18 sep. 2024.