Kallie George. (2017). "Duck, Duck, Dinosaur: Snowy Surprise (My First I Can Read)". HarperCollins.
Chicago-čujuhus (17. p.)Kallie George. "Duck, Duck, Dinosaur: Snowy Surprise (My First I Can Read)". HarperCollins, 2017.
MLA-čujuhus (9. p.)Kallie George. "Duck, Duck, Dinosaur: Snowy Surprise (My First I Can Read)". HarperCollins, 2017.
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