Ziefert, H., & Bolam, E. (2014). Does a hippo go to the doctor?: Think about how everyone keeps healthy ([New edition].). Blue Apple Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रZiefert, Harriet, और Emily Bolam. Does a Hippo Go to the Doctor?: Think About How Everyone Keeps Healthy. [New edition]. Maplewood, NJ: Blue Apple Books, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रZiefert, Harriet, और Emily Bolam. Does a Hippo Go to the Doctor?: Think About How Everyone Keeps Healthy. [New edition]. Blue Apple Books, 2014.
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