Sawaya GF, Kulasingam S, Denberg TD, Qaseem A (มิถุนายน 2015). "Cervical Cancer Screening in Average-Risk Women: Best Practice Advice From the Clinical Guidelines Committee of the American College of Physicians". Annals of Internal Medicine. 162 (12): 851–9. doi:10.7326/M14-2426. PMID25928075.
Sawaya GF, Kulasingam S, Denberg TD, Qaseem A (มิถุนายน 2015). "Cervical Cancer Screening in Average-Risk Women: Best Practice Advice From the Clinical Guidelines Committee of the American College of Physicians". Annals of Internal Medicine. 162 (12): 851–9. doi:10.7326/M14-2426. PMID25928075.