1. Black's law dictionary;Black,1983
2. King JH. The law of medical malpractice in a nutshell. St. Paul, Minn.: West; 1986:65–70.
3. RiskAware for dentists;Gafner,1999
4. Communicating with patients;Council on Dental Practice,1990
5. Periodontal screening and recording;American Dental Association,1992