De Lusignan, S., Ferreira, F., Anand, S., Byford, R., Sherlock, J., & Okusi, C. (2020). Royal College of General Practitioners (RCGP) Research and Surveillance Centre (RSC): Primary care sentinel surveillance network annual report 2019/2020. Royal College of General Practitioners.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)De Lusignan, S., F. Ferreira, S. Anand, R. Byford, J. Sherlock, و C. Okusi. Royal College of General Practitioners (RCGP) Research and Surveillance Centre (RSC): Primary Care Sentinel Surveillance Network Annual Report 2019/2020. Royal College of General Practitioners, 2020.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)De Lusignan, S., et al. Royal College of General Practitioners (RCGP) Research and Surveillance Centre (RSC): Primary Care Sentinel Surveillance Network Annual Report 2019/2020. Royal College of General Practitioners, 2020.