OBIEFUNA, J. N.; INAH, E. O.; ETIM, E. A.; ETUK, I. I.; EFFIONG, R. The Contributions and Challenges of Sustainable Tourism Development in Calabar, Cross River State, Nigeria. Journal of Public Administration, Policy and Governance Research , [S. l.], v. 3, n. 3, p. 190–197, 2025. Disponível em: https://jpapgr.com/index.php/research/article/view/234. Acesso em: 23 jul. 2025.