Gutman, D., & Paillot, J. (2012). Mayor Hubble is in trouble! (First edition.). HarperCollinsPublisher.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGutman, Dan, और Jim Paillot. Mayor Hubble Is in Trouble! First edition. New York: HarperCollinsPublisher, 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGutman, Dan, और Jim Paillot. Mayor Hubble Is in Trouble! First edition. HarperCollinsPublisher, 2012.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.