Chapman, Richard A.
The higher civil service in britain
Constable, 1970
 Buku Teks SO
The Civil service year book 1988
England. Cabinet Office
Her Majesty's Stationery Office, 1988
 Buku Referensi
Dupre, Flint O
Your career in federal civil service
Harper & Row, 1967
 Buku Teks
The Civil service year book 1989
England. Cabinet Office
Her Majesty's Stationery Office, 1989
 Buku Referensi
International handbook on civil service systems
editor, Andrew Massey
Edwar Elgar, 2011
 Buku Teks