U. S. National Health Survey. (1958). Health statistics. Ser. B, No. 1- Feb. 1958-. s.n.
Cita Chicago (17th ed.)U. S. National Health Survey. Health Statistics. Ser. B, No. 1- Feb. 1958-. Washington: s.n, 1958.
Cita MLA (9th ed.)U. S. National Health Survey. Health Statistics. Ser. B, No. 1- Feb. 1958-. s.n, 1958.
Atenció: Aquestes cites poden no estar 100% correctes.