Esper, M. T. (2022). A sacred oath: Memoirs of a Secretary of Defense during extraordinary times (First edition.). William Morrow, an imprint of HarperCollinsPublishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEsper, Mark T. A Sacred Oath: Memoirs of a Secretary of Defense During Extraordinary Times. First edition. New York, NY: William Morrow, an imprint of HarperCollinsPublishers, 2022.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEsper, Mark T. A Sacred Oath: Memoirs of a Secretary of Defense During Extraordinary Times. First edition. William Morrow, an imprint of HarperCollinsPublishers, 2022.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.