@Book{BVMC:704005, author = {Ruiz, Edmundo}, title = {[Carta de Edmundo Ruiz a Gustavo A. Madero. México, D.F., 23 de abril de 1911]}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2014}, year = {2014}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc8s6k5} }