Cita APA (7th ed.)

Duffy, J. (1968). A history of public health in New York City, 1625-1866. Russell Sage Foundation.

Cita Chicago (17th ed.)

Duffy, John. A History of Public Health in New York City, 1625-1866. New York: Russell Sage Foundation, 1968.

Cita MLA (9th ed.)

Duffy, John. A History of Public Health in New York City, 1625-1866. Russell Sage Foundation, 1968.