Moreno, Alejandro, and Patricio Méndez. “Party Identification in the 2000 and 2006 Presidential Elections in Mexico”. Política y gobierno 14, no. 1 (April 13, 2007): 43–75. Accessed October 13, 2026. http://www.politicaygobierno.cide.edu/index.php/pyg/article/view/270.