Harley, B., & Gustavson, A. (2014). Charlie Bumpers vs. the Really Nice Gnome (First edition.). Peachtree Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHarley, Bill, और Adam Gustavson. Charlie Bumpers Vs. the Really Nice Gnome. First edition. Atlanta, Georgia: Peachtree Publishers, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHarley, Bill, और Adam Gustavson. Charlie Bumpers Vs. the Really Nice Gnome. First edition. Peachtree Publishers, 2014.
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