Não informado. (1969). The Year book of neurology and neurosurgery. Year Book Medical Publishers.
Chicago-referens (17:e uppl.)Não informado. The Year Book of Neurology and Neurosurgery. Chicago, Ill: Year Book Medical Publishers, 1969.
MLA-referens (8:e uppl.)Não informado. The Year Book of Neurology and Neurosurgery. Year Book Medical Publishers, 1969.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.