Czajak, P., & Grieb, W. (2014). Monster needs his sleep (First edition.). Scarletta Kids.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCzajak, Paul, और Wendy Grieb. Monster Needs His Sleep. First edition. Minneapolis, Minnesota: Scarletta Kids, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCzajak, Paul, और Wendy Grieb. Monster Needs His Sleep. First edition. Scarletta Kids, 2014.
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