CAO, Hao. The Development of U.S. Immigration History: Historical Factors, Formation Mechanisms, and Migrant Groups. Journal of Humanities and Social Sciences Studies, [S. l.], v. 6, n. 5, p. 36–38, 2024. DOI: 10.32996/jhsss.2024.6.5.6. Disponível em: https://al-kindipublishers.org/index.php/jhsss/article/view/6743. Acesso em: 14 dec. 2025.