Black, C., & Hart, T. (2017). Variation in the phenology of Pygoscelis penguins.
芝加哥风格引文Black, C., 与 T. Hart. Variation in the Phenology of Pygoscelis Penguins. 2017.
MLA引文Black, C., 与 T. Hart. Variation in the Phenology of Pygoscelis Penguins. 2017.
警告：这些引文格式不一定是100％准确.