SARAGIH, L. S.; SIBARANI, C. G. G. T.; DHARMA, J. Development of Hots-Based Communication and Business Negotiation Teaching Materials. IPS Journal of Education, [S. l.], v. 1, n. 1, p. 13–20, 2023. DOI: 10.54117/ije.v1i1.6. Disponível em: https://journals.ipsintelligentsia.com/humanities-arts-social-sciences/index.php/ije/article/view/6. Acesso em: 28 dec. 2024.