Cita APA (7a ed.)
Grayson, G. W. The Politics of Mexican Oil. University of Pittsburgh.
Cita estilo Chicago (17a ed.)
Grayson, George W. The Politics of Mexican Oil. Pittsburgh, EUA: University of Pittsburgh.
Cita MLA (9a ed.)
Grayson, George W. The Politics of Mexican Oil. University of Pittsburgh.
Precaución: Estas citas no son 100% exactas.