APA (7 वां संस्करण) प्रशस्ति पत्र

Crocker, J., Farrar, N., Cook, J., & Bulbulia, R. (2020). Recruitment and retention of participants in UK surgical trials: A survey of key issues reported by trial staff. Wiley.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Crocker, JC, N. Farrar, J. Cook, और R. Bulbulia. Recruitment and Retention of Participants in UK Surgical Trials: A Survey of Key Issues Reported by Trial Staff. Wiley, 2020.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Crocker, JC, et al. Recruitment and Retention of Participants in UK Surgical Trials: A Survey of Key Issues Reported by Trial Staff. Wiley, 2020.

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