توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Cook, J., Cook, J., Bongard, E., Heneghan, C., & Butler, C. (2023). Conditional versus non-conditional incentives to maximise return of participant completed questionnaires in clinical trials: A cluster randomised study within a trial. BioMed Central.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Cook, J., JA Cook, E. Bongard, C. Heneghan, و CC Butler. Conditional Versus Non-conditional Incentives to Maximise Return of Participant Completed Questionnaires in Clinical Trials: A Cluster Randomised Study Within a Trial. BioMed Central, 2023.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Cook, J., et al. Conditional Versus Non-conditional Incentives to Maximise Return of Participant Completed Questionnaires in Clinical Trials: A Cluster Randomised Study Within a Trial. BioMed Central, 2023.