Comstock, E., & Sadler, M. (2015). Charlie Piechart and the case of the missing pizza slice (First edition.). Katherine Tegen Books, an imprint of HarperCollins Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रComstock, Eric, और Marilyn Sadler. Charlie Piechart and the Case of the Missing Pizza Slice. First edition. New York, NY: Katherine Tegen Books, an imprint of HarperCollins Publishers, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रComstock, Eric, और Marilyn Sadler. Charlie Piechart and the Case of the Missing Pizza Slice. First edition. Katherine Tegen Books, an imprint of HarperCollins Publishers, 2015.
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