Center for Retirement and Insurance Services (U.S.) & United States. Office of Personnel Management. Guide to federal benefits for federal civilian employees. Center for Retirement and Insurance Services.
Chicago Style (17th ed.) CitationCenter for Retirement and Insurance Services (U.S.) and United States. Office of Personnel Management. Guide to Federal Benefits for Federal Civilian Employees. [Washington, D.C.]: Center for Retirement and Insurance Services.
MLA (9th ed.) CitationCenter for Retirement and Insurance Services (U.S.) and United States. Office of Personnel Management. Guide to Federal Benefits for Federal Civilian Employees. Center for Retirement and Insurance Services.
Warning: These citations may not always be 100% accurate.