Frolik, Lawrence A.
Elder Law in a Nutshell
West Publishing , 2010
 Buku Teks
Kapp, Marshall B.
Legal aspects of elder care
Jones & Bartllett, 2010
 Buku Teks
Scott-Kilvert, Ian
John Webster
Longmans, Green, 1970
 Buku Teks
Merriam-Webster's guide to business correspondence : a merriam-webster
Merriam-Webster's, Incorporated, 1993
 Buku Referensi
Elder, Neil C.M.
Government in Sweden : the executive at work / By Neil C.M. Elder
Pergamon Press, 1970
 Buku Teks