Bibliografía
- Thomas, J. Lane, R, (2001). Publicidad (Kleppner), México: Prentice Hall.
- Norris, J. Advertising and the Transformation of American Society, pp. 1865-1920, Nueva York, Greenwood Press 1990, pag. xiv.
- Pope, D. The Making of Modern Advertsing, Nueva York, Basic Books, 1983, pág. 62
- Lee, J. History of American Journalism, ed. Rev. Boston, Houghton Mifflin, 1993, pag 74.