APA   Click to copy
Christmann, J. A. (2020). The Power of Negativity: A Theory of Abstract Entities. Philosophia, 48, 507–517. https://doi.org/10.1007/s11406-019-00105-4

Chicago/Turabian   Click to copy
Christmann, John Alton. “The Power of Negativity: A Theory of Abstract Entities.” Philosophia 48 (2020): 507–517.

MLA   Click to copy
Christmann, John Alton. “The Power of Negativity: A Theory of Abstract Entities.” Philosophia, vol. 48, Springer Verlag, 2020, pp. 507–17, doi:10.1007/s11406-019-00105-4.

@article{christmann2020a,
  title = {The Power of Negativity: A Theory of Abstract Entities},
  year = {2020},
  journal = {Philosophia},
  pages = {507--517},
  publisher = {Springer Verlag},
  volume = {48},
  doi = {10.1007/s11406-019-00105-4},
  author = {Christmann, John Alton}
}