Markarian, M. (2011). Who scoops elephant poo?: Working at a zoo. Raintree.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMarkarian, Margie. Who Scoops Elephant Poo?: Working at a Zoo. Chicago, Ill.: Raintree, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMarkarian, Margie. Who Scoops Elephant Poo?: Working at a Zoo. Raintree, 2011.
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