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.
Lua i Stíl Chicago (17ú heag.)Crocker, JC, N. Farrar, J. Cook, agus R. Bulbulia. Recruitment and Retention of Participants in UK Surgical Trials: A Survey of Key Issues Reported by Trial Staff. Wiley, 2020.
Lua MLA (9ú heag.)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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