APA-referens (7:e uppl.)

Campbell, M., Beard, D., Blazeby, J., Cousins, S., & Group, T. A. (2023). Further considerations for placebo controls in surgical trials. Springer.

Chicago-referens (17:e uppl.)

Campbell, MK, DJ Beard, JM Blazeby, S. Cousins, och The ASPIRE Group. Further Considerations for Placebo Controls in Surgical Trials. Springer, 2023.

MLA-referens (9:e uppl.)

Campbell, MK, et al. Further Considerations for Placebo Controls in Surgical Trials. Springer, 2023.