ZAHOOR AHMAD; LUBAINA NISAR. Classifications of Countries Based on Their Standard of Living. Pakistan Journal of Commerce and Social Sciences, [S. l.], v. 8, n. 1, p. 74–98, 2014. Disponível em: https://jes.ac.pk/index.php/jes/article/view/494. Acesso em: 11 aug. 2026.