Kessler, R., & Sklar, A. (2009). In the president's secret service: Behind the scenes with agents in the line of fire and the presidents they protect (Unabridged.). Tantor Media.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKessler, Ronald, और Alan Sklar. In the President's Secret Service: Behind the Scenes with Agents in the Line of Fire and the Presidents They Protect. Unabridged. Old Saybrook: Tantor Media, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKessler, Ronald, और Alan Sklar. In the President's Secret Service: Behind the Scenes with Agents in the Line of Fire and the Presidents They Protect. Unabridged. Tantor Media, 2009.
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