National Center for Health Statistics (U.S.). Advance data from Vital & health statistics of the National Center for Health Statistics: Adv Data (Online). Rockville, Md.: U.S. Dept. of Health, Education, and Welfare, Public Health Service, Health Resources Administration.
Citación estilo ChicagoNational Center for Health Statistics (U.S.). Advance Data From Vital & Health Statistics of the National Center for Health Statistics: Adv Data (Online). Rockville, Md.: U.S. Dept. of Health, Education, and Welfare, Public Health Service, Health Resources Administration.
Cita MLANational Center for Health Statistics (U.S.). Advance Data From Vital & Health Statistics of the National Center for Health Statistics: Adv Data (Online). Rockville, Md.: U.S. Dept. of Health, Education, and Welfare, Public Health Service, Health Resources Administration.