APA (7th ed.) Citation

Steinhilber, F., Abreu, J. A., Beer, J., Brunner, I., Christl, M., Fischer, H., . . . Wilhelms, F. (2012). 9,400 years of cosmic radiation and solar activity from ice cores and tree rings. Proceedings of the National Academy of Sciences, 109(16), 5967.

Chicago Style (17th ed.) Citation

Steinhilber, Friedhelm, et al. "9,400 Years of Cosmic Radiation and Solar Activity from Ice Cores and Tree Rings." Proceedings of the National Academy of Sciences 109, no. 16 (2012): 5967.

MLA (9th ed.) Citation

Steinhilber, Friedhelm, et al. "9,400 Years of Cosmic Radiation and Solar Activity from Ice Cores and Tree Rings." Proceedings of the National Academy of Sciences, vol. 109, no. 16, 2012, p. 5967.