INDRIKSONS, Alens. The Verbal and Non-verbal Communication in Professional Training of Border Guards. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, Rezekne, Latvia, v. 1, p. 278–288, 2015. DOI: 10.17770/sie2012vol1.48. Disponível em: https://archive-journals.rtu.lv/sie/article/view/692.. Acesso em: 11 mar. 2026.