Cita APA (7th ed.)

(1999). Health United States 1999. Public Health Services.

Cita Chicago (17th ed.)

Health United States 1999. Hyattsville, Md.: Public Health Services, 1999.

Cita MLA (8th ed.)

Health United States 1999. Public Health Services, 1999.

Atenció: Aquestes cites poden no estar 100% correctes.