Não informado. (1956). National Library of Medicine Catalog. National Library of Medicine.
Chicago-viite (17. p.)Não informado. National Library of Medicine Catalog. Washington: National Library of Medicine, 1956.
MLA-viite (8. p.)Não informado. National Library of Medicine Catalog. National Library of Medicine, 1956.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.