@Misc{BVMC:231976,
author = {Alvar, Manuel},
title = {Lengua nacional y sociolingüística : las constituciones de América},
publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2006},
year = {2006},
url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc765v0}
}