APA   Click to copy
Matthen, M., & Ariew, A. (2002). Two ways of thinking about fitness and natural selection. The Journal of Philosophy, 99, 55–83. https://doi.org/10.2307/3655552

Chicago/Turabian   Click to copy
Matthen, Mohan, and André Ariew. “Two Ways of Thinking about Fitness and Natural Selection.” The Journal of Philosophy 99 (2002): 55–83.

MLA   Click to copy
Matthen, Mohan, and André Ariew. “Two Ways of Thinking about Fitness and Natural Selection.” The Journal of Philosophy, vol. 99, 2002, pp. 55–83, doi:10.2307/3655552.

@article{mohan2002a,
  title = {Two ways of thinking about fitness and natural selection},
  year = {2002},
  journal = {The Journal of Philosophy},
  pages = {55--83},
  volume = {99},
  doi = {10.2307/3655552},
  author = {Matthen, Mohan and Ariew, André}
}