PROF. DR. YOUSSEF HAJEEM AL-TAAY. Spiritual marketing and its role in sustainable tourism industry: An analytical research of opinions of a sample of tour guides in Al- Najaf Al-Ashraf Governorate. Journal of the College of Education for Girls for Humanities, Kufa, Najaf, IRAQ, v. 3, n. 27, 2023. DOI: 10.36327/ewjh.v3i27.11807. Disponível em: https://journal.uokufa.edu.iq/index.php/ewjh/article/view/11807. Acesso em: 19 apr. 2026.