(2016). Polar bears matter / by Tammy Gagne ; content consultant, Dr. Jeff Welker, Fulbright distinguished US Arctic chair-Norway, professor of ecology, University of Alaska Anchorage.
Citace podle Chicago (17th ed.)Polar Bears Matter / by Tammy Gagne ; Content Consultant, Dr. Jeff Welker, Fulbright Distinguished US Arctic Chair-Norway, Professor of Ecology, University of Alaska Anchorage. 2016.
Citace podle MLA (9th ed.)Polar Bears Matter / by Tammy Gagne ; Content Consultant, Dr. Jeff Welker, Fulbright Distinguished US Arctic Chair-Norway, Professor of Ecology, University of Alaska Anchorage. 2016.
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