Nº	Enlace	Autor
1	Complete Music Website http://www.allmusic.com	Ernesto Sanhueza Martínez 7 Abr 201007/04/102010-04-07
2	Summit 1a >> Online Practice! http://wps.pearsonlongman.com/summit1/	Ernesto Sanhueza Martínez 7 Abr 201007/04/102010-04-07
3	English Website http://ingles.ing.uchile.cl	Ernesto Sanhueza Martínez 31 Mar 201031/03/102010-03-31