Feis, W. B. (2002). Grant's Secret Service: The Intelligence War from Belmont to Appomattox. University of Nebraska Press.
Cita Chicago Style (17a ed.)Feis, William B. Grant's Secret Service: The Intelligence War from Belmont to Appomattox. Lincoln, Neb.: University of Nebraska Press, 2002.
Cita MLA (8a ed.)Feis, William B. Grant's Secret Service: The Intelligence War from Belmont to Appomattox. University of Nebraska Press, 2002.
Precaución: Estas citas no son 100% exactas.