Cita APA (7a ed.)

George, H. (1968). The science of political economy. Robert Schalkenbach Foundation.

Cita Chicago Style (17a ed.)

George, Henry. The Science of Political Economy. New York: Robert Schalkenbach Foundation, 1968.

Cita MLA (8a ed.)

George, Henry. The Science of Political Economy. Robert Schalkenbach Foundation, 1968.