MOHAMMED , Jotiar H.; AL-SULAIFANI , Nizar M. Ali. Psychological Engineering and its Contribution to Enhancing the Sustainable Human Resources: An Analytical Research of the Opinions of a Sample of Workers in Private Hospitals in Duhok Governorate. KOYA UNIVERSITY JOURNAL OF HUMANITIES AND SOCIAL SCIENCES, [S. l.], v. 9, n. 1, p. 327–338, 2026. DOI: 10.14500/kujhss.v9n1y2026.pp327-338. Disponível em: https://jhss.koyauniversity.org/index.php/jhss/article/view/1553. Acesso em: 15 mar. 2026.