WALDRON MELANIE. (2019). HABITAT SURVIVAL POLAR REGIONS (2013 Ed.). RAINTREE PUBLISHERS.
Chicago-viite (17. p.)WALDRON MELANIE. HABITAT SURVIVAL POLAR REGIONS. 2013 Ed. CHICAGO: RAINTREE PUBLISHERS, 2019.
MLA-viite (9. p.)WALDRON MELANIE. HABITAT SURVIVAL POLAR REGIONS. 2013 Ed. RAINTREE PUBLISHERS, 2019.
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