Vértice Universitario Magazine Year 13 No. 51, July-September 2011, is a quarterly publication edited by the University of Sonora, through the Division of Economic and Administrative Sciences. Responsible editor: María Eugenia De la Rosa Leal. Reservation of Rights to Exclusive Use 04-2011-011410054200-102, ISSN: 2007-1388 granted by the National Copyright Institute. Legality of title: 13976. Legality of Content: 11549, both granted by the Qualifying Commission for Illustrated Publications and Magazines of the Ministry of the Interior. Printed by Imagen Digital del Noroeste, Veracruz no. 19, Col. San Benito, Hermosillo, Sonora, Mexico, this issue was finished printing on October 30, 2011 with a print run of 400 copies.