Ortiz-Mena L. N., A. (1999). Jeffrey A. Frankel, Regional Trading Blocs in the World Economie System, Washington, D. C., Institute for International Economies, 1997, 364 p. Política y gobierno, 6(2), 543-546. http://www.politicaygobierno.cide.edu/index.php/pyg/article/view/457