@book{ BA24817391, author = "Piacentini, Joseph S. and Foley, Jill D. and Anzik, Michael and Employee Benefit Research Institute (Washington, D.C.)", title = "EBRI databook on employee benefits", publisher = "Employee Benefit Research Institute", year = "1992", edition = "2nd ed", URL = "https://ci.nii.ac.jp/ncid/BA24817391" }