Centers for Medicare & Medicaid Services (CMS) Office of Information Service (2008). Selecting a development approach (页面存档备份,存于互联网档案馆). Webarticle. United States Department of Health and Human Services (HHS). Re-validated: March 27, 2008. Retrieved 27 Oct 2008.
Centers for Medicare & Medicaid Services (CMS) Office of Information Service (2008). Selecting a development approach (页面存档备份,存于互联网档案馆). Webarticle. United States Department of Health and Human Services (HHS). Re-validated: March 27, 2008. Retrieved 27 Oct 2008.