Não informado. (1980). Compendium of Continuing Education in Dentistry. Dental Learning Systems.
Chicago-referens (17:e uppl.)Não informado. Compendium of Continuing Education in Dentistry. Newtown, Pa: Dental Learning Systems, 1980.
MLA-referens (8:e uppl.)Não informado. Compendium of Continuing Education in Dentistry. Dental Learning Systems, 1980.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.