Chan, A., & Altman, D. (2003). Epidemiology of recent randomised controlled trials.
Cita Chicago Style (17a ed.)Chan, A., y D. Altman. Epidemiology of Recent Randomised Controlled Trials. 2003.
Cita MLA (9a ed.)Chan, A., y D. Altman. Epidemiology of Recent Randomised Controlled Trials. 2003.
Precaución: Estas citas no son 100% exactas.