U.S. National Center for Health Statistics. (1965). Health resources statistics. U.S. Government Printing Office.
Cita Chicago (17th ed.)U.S. National Center for Health Statistics. Health Resources Statistics. Washington: U.S. Government Printing Office, 1965.
Cita MLA (9th ed.)U.S. National Center for Health Statistics. Health Resources Statistics. U.S. Government Printing Office, 1965.
Atenció: Aquestes cites poden no estar 100% correctes.