Hopewell, S., & Clarke, M. (2004). Impact of grey literature on systematic reviews of randomized trials.
Cita Chicago Style (17a ed.)Hopewell, S., y M. Clarke. Impact of Grey Literature on Systematic Reviews of Randomized Trials. 2004.
Cita MLA (9a ed.)Hopewell, S., y M. Clarke. Impact of Grey Literature on Systematic Reviews of Randomized Trials. 2004.
Precaución: Estas citas no son 100% exactas.