TAYYEB SHABBIR; JAVED ASHRAF. Interpreting Sheepskin Effects of Investment in Schooling. Pakistan Journal of Commerce and Social Sciences, [S. l.], v. 5, n. 2, p. 202–215, 2011. Disponível em: https://jes.ac.pk/index.php/jes/article/view/601. Acesso em: 10 nov. 2026.