Hatkoff, I., Hatkoff, C., Kahumbu, P., & Greste, P. (2007). Owen & Mzee: The language of friendship. Scholastic Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHatkoff, Isabella, Craig Hatkoff, P. Kahumbu, और Peter Greste. Owen & Mzee: The Language of Friendship. New York: Scholastic Press, 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHatkoff, Isabella, et al. Owen & Mzee: The Language of Friendship. Scholastic Press, 2007.
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