1. Advertising. Principles and Practice;Wells,1995
2. Virginia State Board of Pharmacy v. Virginia Citizens Consumer Council 425 U.S. 748. 1976.
3. Bates v. State Bar of Arizona. 433 U.S. 350. 1977.
4. Goldfarb v. Virginia Sate Bar 421 U.S. 773. 1975.
5. Professional Services: A report on the general effect on the public interest of certain restrictive practices so far as they prevail in relation to the supply of professional services. Cmnd 4463-1/2,1970