Cita APA (7a ed.)

Clarke, M., Hopewell, S., & Chalmers, I. (2010). Clinical trials should begin and end with systematic reviews of relevant evidence: 12 years and waiting.

Cita Chicago Style (17a ed.)

Clarke, M., S. Hopewell, y I. Chalmers. Clinical Trials Should Begin and End with Systematic Reviews of Relevant Evidence: 12 Years and Waiting. 2010.

Cita MLA (9a ed.)

Clarke, M., et al. Clinical Trials Should Begin and End with Systematic Reviews of Relevant Evidence: 12 Years and Waiting. 2010.