Bennett-Watt HD Productions. (2014). Mount Rushmore, Badlands, Wind Cave, Jewel Cave, & Minuteman Missile, South Dakota. Bennett-Watt HD Productions, Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBennett-Watt HD Productions. Mount Rushmore, Badlands, Wind Cave, Jewel Cave, & Minuteman Missile, South Dakota. Issaquah, WA: Bennett-Watt HD Productions, Inc., 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBennett-Watt HD Productions. Mount Rushmore, Badlands, Wind Cave, Jewel Cave, & Minuteman Missile, South Dakota. Bennett-Watt HD Productions, Inc., 2014.
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