Asuncion Bernardez (1991). "The Mass Media"(PDF). Graves retrasos a – E-Prints Complutense. Archived from the original(Book chapter) on 18 May 2015. Retrieved 6 May 2015.
Asuncion Bernardez (1991). "The Mass Media"(PDF). Graves retrasos a – E-Prints Complutense. Archived from the original(Book chapter) on 18 May 2015. Retrieved 6 May 2015.