Boynton, S. (2023). Hippos remain calm (First edition.). Boynton Bookworks, an imprint of Simon & Schuster Children's Publishing Division.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBoynton, Sandra. Hippos Remain Calm. First edition. New York, NY: Boynton Bookworks, an imprint of Simon & Schuster Children's Publishing Division, 2023.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBoynton, Sandra. Hippos Remain Calm. First edition. Boynton Bookworks, an imprint of Simon & Schuster Children's Publishing Division, 2023.
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