Anthropogenic climate change is worsening North American pollen seasons.

MLA

Anderegg, William R. L., et al. “Anthropogenic Climate Change Is Worsening North American Pollen Seasons.” Proceedings of the National Academy of Sciences of the United States of America, vol. 118, no. 7, Feb. 2021, pp. 1–6. EBSCOhost, https://doi.org/10.1073/pnas.2013284118.

APA

Anderegg, W. R. L., Abatzoglou, J. T., Anderegg, L. D. L., Bielory, L., Kinney, P. L., & Ziska, L. (2021). Anthropogenic climate change is worsening North American pollen seasons. Proceedings of the National Academy of Sciences of the United States of America, 118(7), 1–6. https://doi.org/10.1073/pnas.2013284118

Chicago

Anderegg, William R. L., John T. Abatzoglou, Leander D. L. Anderegg, Leonard Bielory, Patrick L. Kinney, and Lewis Ziska. 2021. “Anthropogenic Climate Change Is Worsening North American Pollen Seasons.” Proceedings of the National Academy of Sciences of the United States of America 118 (7): 1–6. doi:10.1073/pnas.2013284118.