B. Nacif, «Keith Khrebel, Pivotal Politics: a theory of US Lawmaking, Chicago University Press, 258 p»., PyG, vol. 9, n.º 1, pp. 270–273, abr. 2002, Accedido: oct. 13, 2026. Disponible en: http://www.politicaygobierno.cide.edu/index.php/pyg/article/view/383