APA   Click to copy
Hayes, J., & Bell, V. (2014). Diagnosis: one useful method among many. The Lancet. Psychiatry.

Chicago/Turabian   Click to copy
Hayes, J., and V. Bell. “Diagnosis: One Useful Method among Many.” The lancet. Psychiatry (2014).

MLA   Click to copy
Hayes, J., and V. Bell. “Diagnosis: One Useful Method among Many.” The Lancet. Psychiatry, 2014.

@article{j2014a,
  title = {Diagnosis: one useful method among many.},
  year = {2014},
  journal = {The lancet. Psychiatry},
  author = {Hayes, J. and Bell, V.}
}