FRIESEN, Norm; MCGREAL, Rory. International E-learning Specifications. The International Review of Research in Open and Distributed Learning, [S. l.], v. 3, n. 2, 2002. DOI: 10.19173/irrodl.v3i2.90. Disponível em: https://www.irrodl.org/index.php/irrodl/article/view/90. Acesso em: 24 apr. 2024.