Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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