A Primer on International Trade by Jan Pen. Random House, New York, 1967. The Pakistan Development Review, [S. l.], v. 10, n. 4, p. pp.500–503, 2022. DOI: 10.30541/v10i4pp.500-503. Disponível em: https://thepdr.pk/index.php/pdr/article/view/296. Acesso em: 8 jun. 2025.