HAQIEM, Luqman. SPIRITUAL LEADERSHIP, WORKPLACE SPIRITUALITY, LEARNED OPTIMISM ON PROMISE-BASED MANAGEMENT. Journal of Islamic Management Studies, [S. l.], v. 9, n. 1, p. 1–20, 2026. Disponível em: https://publications.waim.org.my/index.php/jims/article/view/144. Acesso em: 21 feb. 2026.