Não informado. (1933). Northwest Dentistry. Minnesota State Dental Association.
Chicago-referens (17:e uppl.)Não informado. Northwest Dentistry. Saint Paul, Minn: Minnesota State Dental Association, 1933.
MLA-referens (8:e uppl.)Não informado. Northwest Dentistry. Minnesota State Dental Association, 1933.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.