Clark, G. (1990). Outline of the U S Economy. United States Department of State.
Cita Chicago Style (17a ed.)Clark, George. Outline of the U S Economy. United States Department of State, 1990.
Cita MLA (9a ed.)Clark, George. Outline of the U S Economy. United States Department of State, 1990.
Precaución: Estas citas no son 100% exactas.