APA (7th ed.) Citation

F, S., P, M., Sim, F., & Mackie, P. (2006). Climate change and health. Lancet, 367(9528), 2039. https://doi.org/10.1016/s0140-6736(06)68901-0

Chicago Style (17th ed.) Citation

F, Sim, Mackie P, Fiona Sim, and Phil Mackie. "Climate Change and Health." Lancet 367, no. 9528 (2006): 2039. https://doi.org/10.1016/s0140-6736(06)68901-0.

MLA (9th ed.) Citation

F, Sim, et al. "Climate Change and Health." Lancet, vol. 367, no. 9528, 2006, p. 2039, https://doi.org/10.1016/s0140-6736(06)68901-0.