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.