Não informado. (1981). International Journal of Periodontics and Restorative Dentistry. Quintessence Publishing.
Chicago-referens (17:e uppl.)Não informado. International Journal of Periodontics and Restorative Dentistry. Chicago, Ill: Quintessence Publishing, 1981.
MLA-referens (8:e uppl.)Não informado. International Journal of Periodontics and Restorative Dentistry. Quintessence Publishing, 1981.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.