Snodgrass, G. M. (2019). Holding the line: Inside Trump's Pentagon with Secretary Mattis. Sentinel.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSnodgrass, Guy M. Holding the Line: Inside Trump's Pentagon with Secretary Mattis. [New York]: Sentinel, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSnodgrass, Guy M. Holding the Line: Inside Trump's Pentagon with Secretary Mattis. Sentinel, 2019.
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