@Misc{BVMC:283454, author = {Nogueira Fos, Rubén}, author = {López Vicente, Teresa}, title = {Lección 7: Profesiones y máquinas}, publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2014}, year = {2011}, url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmcxw4r0} }