APA (7th ed.) Citation

Blunden, J., Boyer, T., Grooss, J., & Müller, R. (2021). State of the Climate in 2020. Bulletin of the American Meteorological Society, 102(8), S1.

Chicago Style (17th ed.) Citation

Blunden, J., T. Boyer, Jens-Uwe Grooss, and Rolf Müller. "State of the Climate in 2020." Bulletin of the American Meteorological Society 102, no. 8 (2021): S1.

MLA (9th ed.) Citation

Blunden, J., et al. "State of the Climate in 2020." Bulletin of the American Meteorological Society, vol. 102, no. 8, 2021, p. S1.