Pumphrey, J., Pumphrey, J., & Willems, M. (2022). It's a sign! (First edition.). Hyperion Books for Children.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPumphrey, Jarrett, Jerome Pumphrey, और Mo Willems. It's a Sign! First edition. New York: Hyperion Books for Children, 2022.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPumphrey, Jarrett, et al. It's a Sign! First edition. Hyperion Books for Children, 2022.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.