HAN, Wenhui. Sales Psychology: How to Improve Closing Rates by Insight into Customer Needs. Frontiers in Humanities and Social Sciences, [S. l.], v. 5, n. 9, p. 101–107, 2025. DOI: 10.54691/karmwx66. Disponível em: https://fhssjournal.org/index.php/ojs/article/view/348. Acesso em: 14 jun. 2026.