The number of patients required in a clinical trial.

MLA

Boag, J. W., et al. “The Number of Patients Required in a Clinical Trial.” The British Journal of Radiology, vol. 44, no. 518, Feb. 1971, pp. 122–25. EBSCOhost, https://doi.org/10.1259/0007-1285-44-518-122.

APA

Boag, J. W., Haybittle, J. L., Fowler, J. F., & Emery, E. W. (1971). The number of patients required in a clinical trial. The British Journal of Radiology, 44(518), 122–125. https://doi.org/10.1259/0007-1285-44-518-122

Chicago

Boag, J W, J L Haybittle, J F Fowler, and E W Emery. 1971. “The Number of Patients Required in a Clinical Trial.” The British Journal of Radiology 44 (518): 122–25. doi:10.1259/0007-1285-44-518-122.