A. ABDULLAH, H.; HASAN RAMADAN, A. The Structural Foundations for Psychological Capital and its Role in the Constructive Foundation of Intellectual Capital Analytical research for a sample opinions of engineers in the North Oil Company - Salah Al-Din branch. TANMIYAT AL-RAFIDAIN, [S. l.], v. 40, n. 131, p. 161–180, 2021. DOI: 10.33899/tanra.2021.169632. Disponível em: https://tanmiyat.uomosul.edu.iq/index.php/tanmiyat/article/view/30151. Acesso em: 8 sep. 2025.