Cipriani, A., & Geddes, J. (2009). What is a randomised controlled trial?
Cita Chicago (17th ed.)Cipriani, A., i J. Geddes. What Is a Randomised Controlled Trial? 2009.
Cita MLA (9th ed.)Cipriani, A., i J. Geddes. What Is a Randomised Controlled Trial? 2009.
Atenció: Aquestes cites poden no estar 100% correctes.