Pennypacker, S., Brown, J., & Pamintuan, M. (2009). The Mount Rushmore calamity (1st Harper Trophy ed.). HarperCollins.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPennypacker, Sara, Jeff Brown, और Macky Pamintuan. The Mount Rushmore Calamity. 1st Harper Trophy ed. New York, NY: HarperCollins, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPennypacker, Sara, et al. The Mount Rushmore Calamity. 1st Harper Trophy ed. HarperCollins, 2009.
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