ARTHUR KRAFT; JOHN KRAFT. Spirit Airlines: the Ultra Low-Cost Airline That Was Not Low Cost . INTERNATIONAL JOURNAL OF MANAGEMENT RESEARCH AND REVIEW, India, v. 16, n. 3, p. 200–203, 2026. Disponível em: https://ijmrr.com/index.php/ijmrr/article/view/758. Acesso em: 25 oct. 2026.