APA   Click to copy
Koch, T., Wendling, B., & Wilson, N. E. (2018). Physician market structure, patient outcomes, and spending: an examination of Medicare beneficiaries. Health Services Research, 53, 3549–3568.

Chicago/Turabian   Click to copy
Koch, Thomas, Brett Wendling, and Nathan E Wilson. “Physician Market Structure, Patient Outcomes, and Spending: an Examination of Medicare Beneficiaries.” Health services research 53 (2018): 3549–3568.

MLA   Click to copy
Koch, Thomas, et al. “Physician Market Structure, Patient Outcomes, and Spending: an Examination of Medicare Beneficiaries.” Health Services Research, vol. 53, Wiley Online Library, 2018, pp. 3549–68.

@article{koch2018a,
  title = {Physician market structure, patient outcomes, and spending: an examination of Medicare beneficiaries},
  year = {2018},
  journal = {Health services research},
  pages = {3549--3568},
  publisher = {Wiley Online Library},
  volume = {53},
  author = {Koch, Thomas and Wendling, Brett and Wilson, Nathan E}
}