GUL, S.; GHAFAR KHAN, A.; AJMAIR, M. Relationship between Human Capital and Labour Productivity. Pakistan Social Sciences Review, Gujranwala, Pakistan, v. 6, n. 2, p. 663–677, 2022. Disponível em: https://ojs.pssr.org.pk/journal/article/view/167. Acesso em: 3 may. 2024.