APA

Cook J. A., Hislop J. M., Altman D. G., Briggs A. H., Fayers P. M., Norrie J. D., Ramsay C. R., Harvey I. M. & Vale L. D. (2014). Use of methods for specifying the target difference in randomised controlled trial sample size calculations: Two surveys of trialists' practice. : Clinical trials (London, England).

Chicago

Cook Jonathan A, Hislop Jennifer M, Altman Doug G, Briggs Andrew H, Fayers Peter M, Norrie John D, Ramsay Craig R, Harvey Ian M and Vale Luke D. 2014. Use of methods for specifying the target difference in randomised controlled trial sample size calculations: Two surveys of trialists' practice. : Clinical trials (London, England).

Harvard

Cook J. A., Hislop J. M., Altman D. G., Briggs A. H., Fayers P. M., Norrie J. D., Ramsay C. R., Harvey I. M. and Vale L. D. (2014). Use of methods for specifying the target difference in randomised controlled trial sample size calculations: Two surveys of trialists' practice. : Clinical trials (London, England).

MLA

Cook Jonathan A, Hislop Jennifer M, Altman Doug G, Briggs Andrew H, Fayers Peter M, Norrie John D, Ramsay Craig R, Harvey Ian M and Vale Luke D. Use of methods for specifying the target difference in randomised controlled trial sample size calculations: Two surveys of trialists' practice. : Clinical trials (London, England). 2014.