ABDULLAH, Mohammed Mahmood. The Role of Content Marketing in Achieving Customer Happiness An Analytical Study of the Opinions of a Sample of (Apple - Iphone) Users in Three Faculties of Tikrit University. Tikrit Journal of Administrative and Economic Sciences, [S. l.], v. 18, n. 59, 2, p. 157–175, 2022. DOI: 10.25130/tjaes.18.59.2.10. Disponível em: https://www.tjaes.org/ojs/index.php/tjaes/article/view/472. Acesso em: 7 mar. 2026.