Marzollo, J., Wick, W., Marzollo, D., & Marzollo, D. (2019). I spy Christmas: A book of picture riddles ([2019 edition].). Cartwheel Books, an imprint of Scholastic Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMarzollo, Jean, Walter Wick, Dan Marzollo, और Dave Marzollo. I Spy Christmas: A Book of Picture Riddles. [2019 edition]. New York: Cartwheel Books, an imprint of Scholastic Inc., 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMarzollo, Jean, et al. I Spy Christmas: A Book of Picture Riddles. [2019 edition]. Cartwheel Books, an imprint of Scholastic Inc., 2019.
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