Waller, D. C. (2019). Lincoln's spies: Their secret war to save a nation. Simon & Schuster.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWaller, Douglas C. Lincoln's Spies: Their Secret War to Save a Nation. New York: Simon & Schuster, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWaller, Douglas C. Lincoln's Spies: Their Secret War to Save a Nation. Simon & Schuster, 2019.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.