Cita APA (7th ed.)

Chan, A., & Altman, D. (2003). Epidemiology of recent randomised controlled trials.

Cita Chicago (17th ed.)

Chan, A., i D. Altman. Epidemiology of Recent Randomised Controlled Trials. 2003.

Cita MLA (9th ed.)

Chan, A., i D. Altman. Epidemiology of Recent Randomised Controlled Trials. 2003.

Atenció: Aquestes cites poden no estar 100% correctes.