Clyde Robert Bulla. (1982). Daniel's Duck (I Can Read Level 3). HarperCollins.
Chicago-čujuhus (17. p.)Clyde Robert Bulla. Daniel's Duck (I Can Read Level 3). HarperCollins, 1982.
MLA-čujuhus (9. p.)Clyde Robert Bulla. Daniel's Duck (I Can Read Level 3). HarperCollins, 1982.
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