Cook, J., Julious, S., Sones, W., Hampson, L., Hewitt, C., Berlin, J., . . . Vale, L. (2018). DELTA2 guidance on choosing the target difference and undertaking and reporting the sample size calculation for a randomised controlled trial. BioMed Central.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cook, J., et al. DELTA2 Guidance on Choosing the Target Difference and Undertaking and Reporting the Sample Size Calculation for a Randomised Controlled Trial. BioMed Central, 2018.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Cook, J., et al. DELTA2 Guidance on Choosing the Target Difference and Undertaking and Reporting the Sample Size Calculation for a Randomised Controlled Trial. BioMed Central, 2018.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.