Waller, D. C. (2019). Lincoln's spies: Their secret war to save a nation. Simon & Schuster.
Cita Chicago Style (17a ed.)Waller, Douglas C. Lincoln's Spies: Their Secret War to Save a Nation. New York: Simon & Schuster, 2019.
Cita MLA (8a ed.)Waller, Douglas C. Lincoln's Spies: Their Secret War to Save a Nation. Simon & Schuster, 2019.
Precaución: Estas citas no son 100% exactas.