AHYA KHOIRUNISA ACWA. Marketing and Service Strategy in an Effort to Improve the Quality of Competition at the Hajj and Umrah Travel Agency at PT. Qiblatain Ama Tour. Demagogi: Journal of Social Sciences, Economics and Education, [S. l.], v. 4, n. 1, p. 13–21, 2026. DOI: 10.61166/demagogi.v4i1.192. Disponível em: http://www.demagogi.com/index.php/i/article/view/192. Acesso em: 26 aug. 2026.