LIEPA, Diāna. Integration of Foreign Languages in Study Process. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, Rezekne, Latvia, v. 1, p. 244–254, 2015. DOI: 10.17770/sie2015vol1.298. Disponível em: https://archive-journals.rtu.lv/sie/article/view/1068.. Acesso em: 11 mar. 2026.