LIČEN, N. Handbook of Lifelong Learning for Sustainable Development. Andragoška spoznanja, [S. l.], v. 24, n. 4, p. 151–152, 2018. DOI: 10.4312/as.24.4.151-152. Disponível em: https://revije.ff.uni-lj.si/AndragoskaSpoznanja/article/view/8146. Acesso em: 1 dec. 2021.