Robertson, M. P. (2008). The dragon and the gruesome twosome. Frances Lincoln Children's Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRobertson, M. P. The Dragon and the Gruesome Twosome. London: Frances Lincoln Children's Books, 2008.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRobertson, M. P. The Dragon and the Gruesome Twosome. Frances Lincoln Children's Books, 2008.
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