Hooper, M. (2008). The ferocious summer: Adélie penguins and the warming of Antactica. Greystone Books.
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Chicago-čujuhus (17. p.)
Hooper, Meredith. The Ferocious Summer: Adélie Penguins and the Warming of Antactica. Vancouver, B.C.: Greystone Books, 2008.
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MLA-čujuhus (9. p.)
Hooper, Meredith. The Ferocious Summer: Adélie Penguins and the Warming of Antactica. Greystone Books, 2008.
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