Dyfyniad APA

Black, C., & Hart, T. (2017). Variation in the phenology of Pygoscelis penguins.

Dyfyniad Arddull Chicago

Black, C., and T. Hart. Variation in the Phenology of Pygoscelis Penguins. 2017.

Dyfyniad MLA

Black, C., and T. Hart. Variation in the Phenology of Pygoscelis Penguins. 2017.

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