APA (7th ed.) Citation

Campbell, M., Elbourne, D., & Altman, D. (2004). CONSORT statement: Extension to cluster randomised trials.

Chicago Style (17th ed.) Citation

Campbell, M., DR Elbourne, and D. Altman. CONSORT Statement: Extension to Cluster Randomised Trials. 2004.

MLA (9th ed.) Citation

Campbell, M., et al. CONSORT Statement: Extension to Cluster Randomised Trials. 2004.