Não informado. (1963). Vital and health statistics. National Center for Health Statistics.
Chicago-viite (17. p.)Não informado. Vital and Health Statistics. Washington: National Center for Health Statistics, 1963.
MLA-viite (8. p.)Não informado. Vital and Health Statistics. National Center for Health Statistics, 1963.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.