APA citiranje

(2016). Polar bears matter / by Tammy Gagne ; content consultant: Jeff Welker.

Chicago Style (17th ed.) Citation

Polar Bears Matter / by Tammy Gagne ; Content Consultant: Jeff Welker. 2016.

MLA citiranje

Polar Bears Matter / by Tammy Gagne ; Content Consultant: Jeff Welker. 2016.

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