APA   Click to copy
Schonmann, Y., Mansfield, K., Hayes, J. F., Roberts, A., Smeeth, L., & Langan, S. (2018). Diagnoses code list - Harmful alcohol use Read codes.

Chicago/Turabian   Click to copy
Schonmann, Y., K. Mansfield, Joseph F Hayes, A. Roberts, L. Smeeth, and S. Langan. “Diagnoses Code List - Harmful Alcohol Use Read Codes” (2018).

MLA   Click to copy
Schonmann, Y., et al. Diagnoses Code List - Harmful Alcohol Use Read Codes. 2018.

@article{y2018a,
  title = {Diagnoses code list - Harmful alcohol use Read codes},
  year = {2018},
  author = {Schonmann, Y. and Mansfield, K. and Hayes, Joseph F and Roberts, A. and Smeeth, L. and Langan, S.}
}