Cita APA

Hopewell, S., & Clarke, M. (2004). Impact of grey literature on systematic reviews of randomized trials.

Citación estilo Chicago

Hopewell, S., and M. Clarke. Impact of Grey Literature on Systematic Reviews of Randomized Trials. 2004.

Cita MLA

Hopewell, S., and M. Clarke. Impact of Grey Literature on Systematic Reviews of Randomized Trials. 2004.

Warning: These citations may not always be 100% accurate.