O'NEIL, Robert. New Challenges in the United States. International Higher Education, [S. l.], n. 57, 2009. DOI: 10.6017/ihe.2009.57.8451. Disponível em: https://www.ejournals.bc.edu/index.php/ihe/article/view/8451. Acesso em: 29 apr. 2026.