@Misc{BVMC:230535,
author = {Gullón, Ricardo},
title = {Unidad en la obra de Antonio Machado},
publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2006},
year = {2006},
url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcmp5d9}
}