Day, L. W., & Velayos, F. (2015). Colorectal Cancer Screening and Surveillance in the Elderly: Updates and Controversies. Gut Liver.
Chicago Style aipamenaDay, Lukejohn W., and Fernando Velayos. "Colorectal Cancer Screening and Surveillance in the Elderly: Updates and Controversies." Gut Liver 2015.
MLA aipamenaDay, Lukejohn W., and Fernando Velayos. "Colorectal Cancer Screening and Surveillance in the Elderly: Updates and Controversies." Gut Liver 2015.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.